In my early 20s i was going out a lot, and i was strangely very successful with girls, and have been able to hold down long relationships, my difficulties there come when they want to live with me.. i don't really want to live with anyone if that makes sense, not that i want to sneak around, just i like space. and feel all claustrophobic if someone is there a lot day and night.
I always looked at bars or clubs in a strange way, a necessary evil, if you didn't want to be alone it was the done thing to meet people when out clubbing. and was able to separate it in my mind i think, by saying to myself, ok its busy, but all these people don't know each other, like myself, they only know the small group of friends they have came out with. where a party is different, often everybody knows everyone else, and i felt left out.
To be honest i have not been out much at all since my late 20s i can count on one hand the amount of times I've been clubbing since like year 2000, and when i do go out i feel i don't fit in at all anymore, I'm older than most in there, and my social skills have got worse, and my anxiety levels are higher.