I've lost my girlfriend, and I've lost my best friend, who was the only one who understood me blah blah blah...

Meh it's just teen angst, don't worry about it, in a few years everything will be much much worse.

Im 20 and I've never had a girlfriend and the last time I went out with a friend outside of school/work was when I was 12.

I play a lot of video games. Harden the fuck up, everything social is a lie. Everyone wants to have friend to grow their social peen and feel good about themselves. With an internet access there is really no need for friends anymore

and no, im not an autist who sperges out whenever I have to leave my basement. I am a functional member of society who handles himself pretty well in social situations

Endure, OP. Take it. They'll hate you for it, but that's the point of OP, he can be the outcast. He can make the choice that no one else can make, the right choice.