I know this feeling as well. Sometimes I think I want to hang out with people, but find that I'm not getting satisfaction from it when I do. It's as if something is still missing and I'm not sure if it's me or the people that I'm with. Normally, I blame it on myself, because everyone else seems to genuinely enjoy the time hanging out, laughing, joking, etc., while I force myself to smile. I wonder why I just can't relax and enjoy life, and why am I still lonely?