Hey, I am a child of divorced parents. It happens, this is what I've come to find out. People change. Anyways, after reading that you want whats best for your daughter, I think you have your focus in the right place. She really is the most important thing. From my experience, just make sure you do whats best for her, don't let her be around if you're in an argument. Just my 2 cents, trying to help here.
Good luck and god bless.