Will my depressed partner ever come back?

I met this guy on a dating app a while back. We talked all day and met 2 days later. He thought I was beautiful. And when I met him he was so nervous his heart was beating so fast and his hand was sweaty when we held hands. He completely melts when I speak in my native language as well.

Things went well during our first meeting. Originally, it was supposed to only be a fling (because that was what I was looking for), but we ended up talking at a coffee shop and realising that we were a pretty good match for each other. We have way too many similarities and he said any guy would be lucky to have me as a girlfriend.

Unfortunately, during the past few weeks, I've been losing him.

The more we talked, the more i noticed that something was wrong. He kept saying things like "what if my plane crashes?" and "what if you can never see me again?". As someone who has suffered from depression for many years, i managed to pick up that the same thing was happening to him. A lot of sh** was happening and it probably stressed him out to the point of depression. And when i saw his twitter, i noticed that he had retweeted things about depression.

He told me he had just broken up with his girlfriend of 3 years only in October last year and he still seemed to be affected by it. That plus a whole lot of other stuff must have driven him into depression, and i could understand that.

However, 2 weeks ago, he disappeared from me for a week. He told me that he was going to have to go into the jungle for army training for 2 days, but after that he didnt contact me back. I was worried something had happened to him so i tried really hard to contact him, but he had me blocked everywhere. I couldnt even call him.

After that he came back and apologised. He admitted that he has depression and that was why he disappeared from me. Of course, i was understanding and took him back.

Things were going well last week, we kept contacting each other throughout the day. He even said that he wanted to marry me after i graduate, and I was ok with that. I was willing to marry him.

But then, on Saturday night, he suddenly told me that he couldnt do it anymore. He thanked me and told me to move on. When I asked him about when he said he wanted to marry me, he said that he still wants to, except maybe when we're more mature and more ready. He even told me that his friend was into me.

Here's what i dont understand: he wants to marry me, he still does, but he thinks i deserve better and wants me to move on. I can understand that depression can make you feel worthless, but why would he ask me to move on when he still hopes that I would be his wife, even to the point of being a wingman for his friend?

I dont want to lose him. I do want to marry him. He has come to be a big part of my life and a reason why i can be smiling to myself throughout the day. i dont want to have to abandon someone i care for, especially when theyre in need because thats how all of my relationships go. When i care for someone, i keep them close forever unless they do something to really mess up the relationship. that's why i have a hard time simply "moving on" from him.

Sorry this was really long, I just have a hard time understanding the logic.

TL;DR my partner is depressed and wants me to move on, but he also says that he still wants to marry me. I cant understand the logic behind his words. will he eventually come around? i can understand where he's coming from and im willing to be patient with him, i just dont understand what hes trying to say. Is this "goodbye forever" or "see you soon"?