Sex problems?

So whenever me and my boyfriend have sex, we always get into the heat of the moment but when it actually comes down to it I don't feel any pleasure at all. I feel like I literally just lay there. I hate it. I always fake my moans and I just feel so bad. Did or does anyone have this problem and was able to like fix it? Or? I do love him, a lot. The sex is just not what I expect.