How to cope with the loneliness after a party?

If you get more drunk at parties, you'll never remember the end of them and so it won't upset you that they're ending.

That said, you have some serious self-confidence issues and you can't go through life relying on others so much. You should try to find a hobby you can do on your own, reading or knitting or something. When you find yourself alone, do that for a little bit and it'll take your mind off the fact that there's nobody around to make you feel socially accepted.

Also, there are more important things in life than being the most popular person in school or whatever. So long as you have a couple of tight friends, who gives a fuck what anyone else thinks. Or at any rate, that's what I've heard from people a lot less popular than myself.

Jam it back in, in the dark.