I know what Momto5 and Tovarich mean about worrying you might lose some friends. I was a bit worried myself when I converted. I was 21 (all those years ago) and my mom was very anti-Mormon at first. But after the Missionaries had come over a couple times for lessons and I'd asked them to sit down for dinner with us, she realized they were just regular guys like most of the ones I went to school with. A lot of people don't know much about Mormons, or what they think they know is mistaken, so they worry about you getting caught up in something strange. But we're pretty normal.
Most of my friends and coworkers aren't members, and we still go out on the weekends or have BBQs and bonfires or go to a sportsbar and watch the game. They know I don't drink and they're all okay with that. Don't worry too much about having to find a whole new circle of friends. Everyone does at first, but most of the time their worries were groundless. Your friends still love to hang out and laugh with you even when you're sober. (You can always tell them they're not losing a buddy, they're gaining a designated driver.)