I'm stuck

So I've been super insecure and depressed about myself lately. My weight has been going up and down lately and now my insecurities has gotten to the point where I don't even socialize or go out of my room because of what I look like. I just feel so lonely and idk what to do. I just hate myself so much, I wish I can be someone else. It's like I'm stuck in a maze where there are only dead ends.