I'm so lonely

I just want friends and a girlfriend, but I'll never have either. I will die sad and alone.

Stop with the self pity.
You're a mental midget, there are a lot of decent people out there.
Stop wasting time, be hygienic, have manners and go join a non-degenerate sports club or something.

You've to cut of toxic people, but surely you've met decent people somewhere in your life.
Seek them out. Don't rush things and slowly integrate and adjust to a good social circle.