I Don't Fit Into Society

I am 26 years old, I work in tech support (that right there should tell you my social skills). I was that awkward kid growing up that everyone picked on, I don't know why but it made me very angry in life so now whenever i'm in a social situation I don't have a good time. I'm incapable of going to a bar and having fun, rather than enjoy myself I just get angry. and the more crowded it is the angrier i am.
In addition to always becoming angry when surrounded by large groups of people, even when i'm around people i'm comfortable with i'm waaaayyyy to honest, i will say anything that comes into my head without thinking about how it will make the other person feel.
I feel like no one will really give me a chance, I haven't even been able to get 1 date in the last 4 years, just recently I had met a very lovely young woman, she said she wanted to be friends first, so i was taking it slow but made my desire to eventually ask her out very clear and she said she was ok with that, and today i find out that after having turned me down on a few different occasions already today she accepted a date from some other guy. I mean am not even worth a shot. I've been so alone for 4 years, i'm not a bad person i just want a chance, but because of how awkward i am i just can't even get that chance i deserve.