I dont know if any girls replied to this or not yet but Joe is right. Girls like to have fun too, so don't think YOU have to go up to them all the time. They might come to you. Though that's not what I'd do but... ya know...
I hate being single but I like not being tied down and a guy on my hip 24/7. I can't stand that... so I just have fun with those that like to do what I like.
For instance... I love sports so I like going to sports bars or events. I met a really great guy, coming out of the washroom of a Blue Jackets game. Nearly spilled his beer... we ended up hanging out a lot and then he forgot to tell me he was moving a month later to South Carolina. Doh!
Just don't try too hard... girls pick up on that easy. Just be you.