My boyfriend lost his drive with me.?

He has given you a couple of reasons...size = pain and history with Father. But if those things didn't matter a while back then consider ruling out diminished Libido. A testosterone test (blood test) can check to see if it is a physical problem. Also find out does he want to work on the problem or is he content with the type and frequency of contact. It is not uncommon for a couple (heteroual from my perspective) to have different drives. People have to decide for themselves how to cope with it and if the relationship is worth working on it or not.