This just breaks my heart. As a woman, I cannot understand walking away from your husband and kids, feeling resentful. Your wife doesn't know how to feel blessed for all that she has had in her life. I am sure the men here will be more helpful to you than I can. Just wanted to say that I really wish you well. I hope your boys are doing ok. God bless.
Most of us really marry only once. First love endures, even unto our dying day. And we never really divorce.