Sorry dude, but this happens to all of us at one time or another. I had something like this going on awhile back.
I have come to the conclusion that wimminz need one of two things.
1) For you to make them feel good about themselves.
2) For you to be their sex toy.
Most don't want both at the same time, but if you can do the first you are in a better posision to do the second. You just have to be sure that when the time for the second comes around that you don't ignore it too long, or too many times. Or you will be permanently the first.