is there something wrong?

I've been with the same man for almost 2 years now. We are happily in love, and happily make love all the time. Not too much of course. But just enough. Anyways, he was my first, and so I didn't know what an actual orgasm felt like. Since we've been together I've only orgasmed 3 times at the most.. the rest of the time I've faked it. Could there be a problem with me, or him, or something else? We try every position, we've done oral, thinking that might make things happen.. but nothing seems to work. Any tips or explanations?