Not much to go off of here but it could be 1 of two things, An easy way for him to get out without feeling like he had to be truthful about how he actually felt. Whatever the limitations may have actually been an issue and he thought he could break them and when you didn’t he realized it wasn’t working. Or perhaps you did come on stronger when you were more comfortable and some guys buck when the cat and mouse game ends too quickly. If you told me more about the situation I could probably say more. Hope this helps.