I am so lonely but what is life without people am I just want existing?

I hate life right now. I have some friends in college that I just meet after my old friend went behind my back and told people I was horrible, he wasn't very nice. No girlfriend for 6 years, this is really irritating. In fact it has gone beyond irritating, it's just shit now. Last of all a constant lonely feeling. I am a nice guy, but it's true what they say nice guys finish last😞.
I really don't know the main problem but I don't think I can stand it anymore. I mean it's so sad but just hugging someone would be better than nothing. So depressing.