I need help starting over

I (18) am graduating high school this year and I am not what I thought I'd be. I always thought I'd lose weight but I emotional eat and I also thought I'd be excelling academically but I'm really just doing okay since I don't study. I got really depressed at the start of high school and it never really went away so I just went through school in a daze and now I'm in my last year and it's hitting me that I never achieve anything I thought I would and that I never had the high school experience I always promised myself as I have no friends and am at home constantly. How do I move past this, motive myself and make the most of the last year with all of this hanging over me. My depression had started to improve but as it did and I thought about all this I just started spiraling and can't seem to do anything and am getting worse.