I usually never ride in the Winter months. I may go 5 months without getting on my bike and when I finally do get back on it sometimes feels like I'm starting all over again. But... I just start with small steps. The first couple of rides may only be 10 miles round trip. The next week I'll start doing 20 miles per ride. Then I just keep adding about 5 miles every third ride and before I know it I'm doing some respectable 45 mile rides again.

Start with small steps and try to find someone to ride with. I ride with 2 old High School buddies twice a week. Nothing fast or strenuous, but it gets me out on my bike and we have a great time. We'll be talking the whole time and before you know it we've done 20 miles and are looking for a coffee shop to kick back at before moving on. Just be sure to enjoy yourself.