How do I heal?? heartbroken...

I need help... I'm going through a really tough divorce....but I love my husband so much. We were together for 6 years total, married for 4, and I was 6 months pregnant when I caught him in a hotel room with another woman.
My attorneys requested his credit card statements so I could identify his extramarital spending. It's been SO HARD to look at them. If I look at old statements, I remember good times. If I look at new statements, I see all the fun places going with his girlfriend, while I'm at home with our daughter. I was supposed to be on those trips...we were supposed to go as a family...that was our favorite restaurant and he took her there...etc.  What hurts the most is that he seems so happy without me and the baby... How do I heal?? Any words of encouragement or advice or hopeful comments would be appreciated...