My hubby cheated w/ his 1st cousin 2 yrs ago, still having hard time moving on.How long b-4 I'm past the pain?

We are still together, but the betrayal is the hardest part to get over. And the worst part is that she pretended to be my friend, and then when she found out that I knew, she threatened me. He is a changed man, has gotten "saved" and is an excellent father...I am the one who feels STUCK. I want to enjoy the person he is now, but I still hold resentment for both of them. Needless to say, she is not a part of our life anymore. When will the pain go away?