It's all about looking at fundamentals of friendships - have fun, encourage and support.
Ask yourself - "what do I love to do?"
Then you can ask yourself "what do I love that someone else out there probably does, too?"
As for encouragement and support, how are you as a listener to issues, how are you as a supporter or motivator?

Also, the living style of your place (urban, solitary, rural, etc) is one of many factors through which we can understand your situation.