Depressed.....

I feel like I'm trapped in a box while everyone else is moving ahead with their lives I am getting so depressed over the school I'm going to , i have 0 friends and it feels as if every time I find someone (boyfriend,friend , just someone I could be close to) not even long before they up and leave me . I just honestly want to die I feel like I'm not getting anywhere so what's the point I feel so abandoned and Lonely it's literally killing me and I been feeling like this for years please help .

P.s I'm 16 years old