Few women can orgasm during intercourse from just the man thrusting in and out. Your clitoris does not get stimulated enough. You will have to help yourself.
Stick your hand in there and rub yourself. Of course it is much easier if you are on top or doggy style. You can even introduce your rabbit during sex. He can also do this and help you out.
You should also direct him to get you off. You are the only one that knows what works for you. You thus have to tell him how to do it, deeper, faster, slower and so on.
Most women find it the easiest to orgasm when they are on top and they control the action.