I'm not sure if I can love him again, should I stay or leave?

My boyfriend and I had been together for almost two years. Our relationship went great, until he cheated. I want to make it clear though, that he is honestly a great, genuine person. Everyone makes mistakes. I’ve known him for about 5 years, so I know I’m not just being naive. In all the years I’ve known him, he’s always been an amazing person. He’s proved to me in the last 6 months that he’s learned from his mistake, that he is himself again and that he wants nothing more than to make me happy. Also, this was a couple years ago and we were both a lot more immature then. We are both 20. But, I decided I needed a lot of time to think about it and to trust him again. So it’s been 6 months since he told me he is still in love with me and I do trust him a lot more, I think he’s a wonderful man and I know he could make me very happy, as he is already. Only problem is, I don’t love him like I used to. Not nearly as much. My feelings are strong, but just not the same. However, I don’t want to say goodbye. Thinking about leaving him really puts a hole in my chest. But I can’t help but feel as if I am being selfish keeping him waiting for something that may never come. I think that maybe as I trust him more and more, I will love him again in time, but I also think sometimes..wouldn’t I love him by now if it were possible? I don’t know. He keeps saying he will wait any length of time for me, but I don’t know if this is right. I just want some opinions on this. Thank you. And please no rude answers.