Try looking back on when you did have sex... Did you like it then? If so look for the same type of situations... maybe you are quite particular in the way you want it. Or if you didn't like it then examine that too. Was he too agressive, too timid. Learn from these shortcomings and look for guys who don't have them. Also make it worth something to you. Having sex just to have sex makes it more routine. As has been stated before, quality is better than quantity. Even a guy can agree with that simply by examining masterbation. He could masterbate every day and get a really weak orgasim each time. Or he could have sex once or twice a week that could blow his mind along with other things. I don't doubt that deep down inside you do want to have sex or atleast a sexual relationship. I've posted this link before, but you may want to look at it because it has some advice. Most of the tips are really for guys looking to rekindle the sexual relationship with their S.O.s, but there is some advice purely for girls to help themselves get back into the "swing" of things
http://blogs.salon.com/0002153/stories/