What determines when you should give up, and move on.?

Anger and resentment go hand in hand. I have been married before and it ended with me raising my daughter as a single parent. I remarried after almost ten years of singlehood. I thought that I was healed but I married a woman who has anger and resentment to most men I just happened to be one of them. I am pive by nature and willing to give my arm for another. She has convinced me that I am mostly wrong and I feel disfuctional and co-dependant (big words Hugh) comes from sessions to help me heal. All I wanted was to lve again. I saw the anger but married anyway now 7+ years later I am depressed and upset. She accused me of wanting to throw her to the dogs a few years ago and at the time I did not feel that way. She is so good to my daughter and they both love each other. I am feeling like flying the coupe but so honest sincere opinions welcome to help me feel like I have some control, I am a christian and failure though acceptable is forgiven but I am not repentant about the way I feel, that is angry depression turned inword.