My girlfriend and I have been together for a year and our relationship is wonderful but in the last four months we have had sex probably five times max. This is very unusual compaired to the beginning of our relationship. I am becoming extremely emotional over the ordeal. I guess I just have a higher sex drive. But I don't understand what I have done to make her feel this way?

Want to bet getting together had become focused on the sex part while everything else became secondary?

Maybe she needs more than good sex. Ask her. How old are you both? Could she be pregnant?