I second what Dawinia said. Do you have hobbies, specific interests, or something new you would like to try? Those might be the best ways to meet people and potentially develop friendships. There is the site meetup.com, for example, for specific interest groups, you can also start your own. Maybe a class?
The recovery meetings are of course a good idea but I generally find that it's best even for my recovery not to focus solely on that at all times but get engaged in a variety of things that interest me.