Libido

My man is pretty packed down there if you know what I mean. And I can never seem to get off or even get in the mood to want sex. Feels like I have no sex drive then when I do give in to sex ( not because I want to but to pleasure him ) it's painful and uncomfortable and I find myself faking noises and thinking how much I can't wait for it to be over. On another note I do have a vibrator and have no problem getting myself off.