IIN that I am in love with my boyfriend and I want to leave him?

I understand that it was his business to do what he wanted while we weren't together, but what I am saying is that I don't know exactly how many other girls he was with and I feel dirty having sex with him not knowing how many or if he even used protection. Before me, he was only with two other girls. I have strong morals and someone who sleeps around recklessly does not fit my standards, and prior to the six months we weren't together, I could not even imagine that he would ever do that because at one time he had the same morals as I, which was one of the reasons we fit so well together.

I don't consider what he did cheating, obviously, since we were not together at the time. We have been back together for 4 months now, and for the first 3 I just kept pretending like nothing ever happened but now the thoughts are eating away at me. I love him more than I have ever loved anyone, but I just don't feel like our relationship is special anymore. I don't feel like I am, nor my body is, nor our sexual relationship is special anymore.