I'm not sure if I'm alone here but I just lack social skills. It's like everyone but me has this secret book of how to interact with people. I'm not autistic or anything but I had little social life when growing up. I was actually rather popular at the Internet but that didn't translate well to real life. I'm now trying to catch up in my early twenties. I meet interesting people every day but connecting with them non-superficially is the hardest part. I am too shy to talk about anything and I have low self-esteem. I literally start to mumble when telling a story if I don't know the person well. So far rationalizing about it hasn't helped.
It's a wonder I managed to get a few friends.