I was married for four and a half years and had a son with him, but things didn't work out and I left him. About a year ago I found a really good guy and we just go married in Oct of 08 but I have a problem with comparing him to my ex and I don't want to loose him what can I do?

Are you comparing him in a good way or a bad one? If you're noticing things he does that are better than what your ex used to do, I don't think there's any reason for concern.

Maybe it is time you got some professional counseling to help you through this. Probably should have done it before marriage, but now is not too late.