24, m, have had some moderate success with women but never did anything truly sexual, and the one time I almost did and denied to go further (she had a boyfriend, two of my friends were sleeping nearby and that is gross to me) the girl (who, months later and after some other bullshit involving a mutual friend I am still pretty hung up on) freaked the fuck out at me. any "relationship" I have been in has ended up with a girl fucking some other dude, usually someone I was close friends with. to this day i have no idea how i got into any of said "relationships." Any advice?

Side note: You keep saying "be social," but what does that even mean? I will never understand what it is I should be saying to people, though I have no real problem approaching/talking to them beyond finding conversation topics.