Girlfriend suddenly breaks up with me because of depression

First off, I know that this as been a topic before hand, but I would like to seek some more answers on a more personal level catered to this specific situation.

My girlfriend of one year and six months (almost seven) suddenly broke up with me. I felt that our relationship was going extraordinarily well, we had our lives planned out together, basically everything that a serious relationship does, she would say "I want to spend the rest of my life with you", etc. things of that nature and I would reply with something similar stating that I wanted to too.

July 15, 2017 she told me that she hasn't really been feeling up to do anything/care about anything, she had never been like this as far as I can tell (then again I suck at reading people) on July 16 I was busy that day and was not able to get to my phone, when I did later that night and texted her I got short answers, and it felt like I wasn't even talking to her because she wasn't even using the usual "cuteness" in our texts like we normally would. We decided to hangout the next day and when I picked her up everything was fine I thought we were how we normally were and I felt that she was happy and our of her rut.

July 18, she was back in her rut and I was severely confused and the day went on. She then asked if we could talk, this was the first hint that I had that she would break up with me. She asked if we could have "real conversations", I'm the person who is honestly too lazy to type out a whole story on the phone, I would rather save the intellectual conversations for the phone, skype, in person, etc. So I agreed that I would try harder to have a "real" conversation, but after that conversation we had I didn't know what to talk about because I felt that what we could talk about wouldn't be enough for her.

July 19, she texts me and she's upset at this point I'm slightly relieved just because she's showing some emotion at least even if it is anger, I'm also concerned. She says that Her and her female friend "A" and her male friend "B" were going to hangout the next day at her house to watch movies. My initial reaction was kind of hurt because usually if she's going to be with another guy even if she's with another female friend she would tell me. She says they've been planning this out for a while and I only found out the day before because something happened. I'll be honest I'm a jealous person but my girlfriend doesn't have a lot of friends just because she can't seem to relate to people or enjoy their company so I was glad that she made another friend but also jealous. We decided to hangout the next day because I want to cheer her up.

July 20, I go to several different stores getting her favorite things, I bring it to her and we just hangout at her house watching movies, but it was different usually we'd be snuggled up cuddling, this time we just had our arms around each other and I understood I wanted to giver her space. Later I take her to her dad's house which is about an hour away from where she lives with her mom, before I had to leave her dad's house I felt that she was getting happier.

July 21, All of a sudden I get another ominous "Can we talk?" text this was when she breaks up with me and it feels like a right hook comes out of nowhere hitting me in the face because I thought things were getting better, and I never thought she would break up with me, especially so suddenly, she says she had been thinking about this for over a week now and that she didn't want to tell me she had been thinking about it because it would hurt me. It made me ponder that when we hung out previously and I thought she was out of her rut that she was thinking about breaking up with me.

July 22, I was so upset, confused, angry, and feeling so many emotions, my friends invited me to have a drink with them and momentarily forget about my problems, I get completely drunk. The next day I ask my ex if we could talk face to face the next day. July 24, we're talking and we're both extremely emotional I tell her that if we don't work out then I'm going to move in with my brother who has always welcomed me with open arms across the country she tells me that she doesn't know if she made the right decision, that she was thinking rashly, and that she didn't know that breaking up with me would make her lose me forever because she loves me, misses me, and cares about me. She's the one pushing for the relationship and I'm the one reluctant to accept because I don't want to get hurt like this again. I decide that I'll give it another go because I would very much like to spend the rest of my life with her.

That same night I get off of work and she texts me extremely angry mad at me for getting drunk because of her. I told her what I did earlier because I felt she should know everything that happened and she was only slightly mad at me for doing what I did. She kept saying that I wasn't healthy for me to do that because of her, I know that but I was just upset. The roles switch and she's the one who doesn't know if she still wants a relationship and I'm the one pushing for it. Unfortunately it doesn't work.

Two days pass and I apologize because I've just been angry at her because I'm feeling so many ups and downs that I have never felt before because of her. We start texting having actual conversations just like we did before we were in a relationship. I'm glad I can talk to her normally and I'm holding onto the small chance that we'll get back together because I would ask "do you think we would ever get back together?" she says "I don't know" that response was enough for me to have hope and keep pushing. July 29, I go to her graduation party a couple days later and she's upset because none of her friends could make it and that her mom had taken it over. She said she wanted me there because she was upset and I would make it worth it.

I feel wanted and I love it, I go to the party and I realize how terrible I feel because she's so close yet I can't call her mine and I can't even touch her. The party absolutely sucks, but near the end I was alone with her so I hold her hand and give her a kiss. On my way home she calls me and we talk about us. She says that she felt really guilty kissing me but not being in a relationship with me and that we can't do that. I ask her if she could see herself with somebody else and she replies "I don't know I haven't thought about that, if I was with somebody else I would probably end up getting out of the relationship to be with you because I would realize how much I miss you" I tell her that I can only see myself with her.

She says that even if we aren't in a relationship that she still wants me to be in her life because I'm her best friend, but I don't know if I can do that because I would be so close and I couldn't call her mine, or worse I would be close but somebody else would call her mine. She says that she loves, cares, and misses me but then why can't she be in a relationship with me? I love talking to her but my heart constantly hurts because we're close but not. I don't know if I should stop talking to her to save myself and see if she'll realize what she lost, or if I should support her as a friend while constantly hurting myself. I want to move so I don't have the chance to hurt myself with her again, but I don't want to have move and then she realizes I'm gone and wants me back. Should I give her space? Should I support her as a friend? How long should I wait to get an answer before deciding to move because I don't want to hurt myself waiting for someone who won't come back to me? I don't know if she actually wants to talk to me as a friend, or if she only wants to talk to me when she doesn't have anybody else to talk to, because I've been the one instigating conversations and she's been iffy on replying.

I don't know what to do, any insight will help, thanks in advance.