I just saw _Boyhood_ over the weekend (fantastic movie, btw), and there was a scene in there that sums up my approach to socialization. The main character is talking to his dad about how he kinda has a girlfriend but it's awkward because when they're at school they've got a ton to talk about, but when they're on the phone at home they're completely different.
The dad drops this little bit of thought-technology his way (and apologies for the mangling of the quote):
"Here's what you do, alright? First off, you gotta ask her a lot of questions. Then you have to listen to the answers, alright? Actually be INTERESTED in her, alright? If you can do those things, you'll be LIGHT YEARS ahead of those other guys."
Ask a lot of questions and be interested in the answers - that'll go a really long way. Remember, everyone's got a story and I think everyone (in some way, shape or form) wants to tell it.
Also, practice socializing. This stuff comes really naturally to some folks and really NOT naturally to others. If you're in the latter camp, practice like you'd practice anything else you want to get good at. One of the local user groups I frequent has what it calls 'socialization practice' after each meetup. It's just everyone heading to a pub and hanging out, but it's a pretty good way to get to know people and practice some of these softer skills.
Best of luck - you can do it :).