Ladies, please help me

My husband cheated on me for the first two years of our relationship, I had just found out I was prego and he was cheating within a week. I decided to stay with him, assuming it wouldn't happen again. Here I am almost a year later and I'm still having trouble dealing with what happened. We would like to stay together our son is just over 13 weeks old. Any thoughts on how to move past this or how to deal? My husband says I should just "get over it". That his good behavior for the better part of a year basically makes up for it. I say no it doesn't, it doesn't make the pain go away and it doesn't make it easier to trust you. Any ideas? Positive feedback only please