Need Help, Please

TL;DR: Need to convince parents to help me out with my (possible) depression, ideas please?

I'm going to say that I'm fairly young, but I promise I'm not trying to act edgy or put up some act or something.
For a bit less than a month now, I've had this empty feeling of not wanting to do anything and no motivation to do anything. It's just a feeling of not knowing what to do and being unable to cheer up. Feeling a bit worthless too I guess? I can't say I'm sad, just empty and unable to feel emotion. My room hasn't seen the sunlight for 2 weeks now because I'm not in the mood to open the curtains.

I'm also rapidly losing interest in my only "hobby," gaming, and I've also lost the little interest I had in music. Recently, I've also begun to feel emotional pain from time to time. Whenever I think about this whole case, I feel like it's hard to breathe and I kind of get upset.

Now I know that everybody undergoes some stress at some point in their life, which is why I'm asking about this, I'm not sure if this is depression. If anything, I would blame this feeling on my family issues, which I'm not going to speak about, but I do have bad family problems. It's not like I can go to see a psychologist or psychiatrist either, since, again, I'm fairly young and my parents would either get upset with me and tell me that it's nothing and I need to cheer up.

Oh, and I don't have suicidal thoughts of any form. I have a good will to live, but I do feel worthless.

I've done some research and asked some people, and from what I've seen this could be depression, however, I haven't seen a doctor or anything, which is what I need help with.

My mom has noticed a change in my behavior, especially since I've quit gaming which I was so much into, but instead of being concerned she's pressuring me to do other things since she's noticed I spend most time on my phone so she wants me to do something else (I'm actually just daydreaming but I have my phone in my hand so she doesn't worry).

My dad is barely home so he hasn't noticed much change in me but if I did talk to him about it I doubt I'd get anything out of it considering all he talks about is "dataism" or something and artificial intelligence taking over the world.
My only sibling, my little brother, is incredibly toxic and started laughing at me the moment I opened up the topic, so I called it off as a joke.

I would like to distance my friends from this topic as most people my age are very toxic, and the few who I could have a serious talk with would just end up making an awkward atmosphere.

I did talk to my mom a bit about it, and as expected, she called it off saying that what I'm feeling is just boredom and related to lack of sleep or something. I could tell that she was concerned, however, and she tried to spend time with me after I talked about it.

Help me, please, this is seriously affecting my life negatively and I can literally feel the pain increasing.