Seriously there are very few things where you have to have a mate in order to participate or enjoy something. Even while married if my wife is not interested in going to see a movie I am fine going alone.
When I was single I did whatever I pleased (hang out with friends, go for walks along the beach, see movies, listen to live music in the park, shop, read books in the book store, go to restaurants, hit nightclubs, connect with other singles online, work out at the gym. In fact I had better luck meeting women when I was by myself instead of being with my friends.
My point is you don't have to be in a relationship to live your life! I've known people that have gone on vacations alone. Oddly enough I have seen more women on cruise vacations alone (without a man or girlfriends). If you love yourself and enjoy your own company as well as maintain a sense of adventure about life odds are you will attract friends wherever you go. Don't let being single/free keep you from doing whatever you want to do! One man's opinion! :-)