Depressed about my social life and stuff?

It seems every one has a relationship but. Me all my friends talk about them. I almost had 1 but I didn't take her to the dance and she found sum1 else and now she likes this douchbag more than me. Gess she wants some1 who will only use her. Anyways I always get riped on for not haveinga gf if I ever get flirtatious they just laff. It seems I get ignored by girls I like or they talk about sum1 they like so I won't talk to them. I just feel like giving up on everything and not try anymore at anything