This is something I also deal with; a boyfriend that is simply not as interested in sex as I am. I seem to be one of the lucky ones, though, because he is very loving and loves to cuddle (role reversal much?). Unfortunately, it still takes a toll on me and I still have periods where I feel unloved and unwanted. In the past few months, we've talked about it several times. What seems to help me the most is having a life of my own and making sure I get plenty of exercise (I think it creates a similar type of release plus acts as a confidence and self esteem booster). We've also tried to compromise where we start out fooling around at least once a week. In the future, my boyfriend is willing to try more than once a week, but he made it clear I couldn't expect it to go from zero to everyday overnight (not saying I'd want it everyday, just saying he couldn't go from nothing to everything). So, we have to start out slow, he has to be willing to try for once a week, and I have to remember to see how he shows his love for me in other ways.

I did come across this blog by CNN's Dr. Gupta, which I found pretty interesting. You could also try showing him this as a jumping off point.
http://pagingdrgupta.blogs.cnn.com/2...week/?hpt=Sbin

Good luck!