I hear ya bro. I've got a female friend that I have fun with a few times/month, and that's about it for me as far as sex and relationships go. I had another lady friend that I had a part-time thing with, but she finally found another man that was ready to commit.
I've gotten into a habit of going to the clubs on the w/e's and just have a few beers when I get there, and then drink just water or diet coke for the last few hours. If I take some fatburners before I go, I'll still be awake and alert when I drive home. And not taking a chance on getting a DWI. It's a shame it has to be that way, but it's tough meeting available women otherwise.