Dear L.:
I have many friends who have made the decision to divorce. They all said something similar to, "Life is just too short," (some said, "I deserve to be happy," "It's time for me," etc.) insinuating that something wonderful was being denied to them by remaining in their marriage.
The thing is, I can't see that any one of them gained anything BETTER by leaving their marriages. Some blamed their inability to improve their lives on the "scars" of the past, on their having to stay in the same town to see the kids, on the irritations of watching HIS life improve dramatically, etc. Every one of my friends ADMITS that they are worse off BUT they still blame it on the past or on him or on something else...they NEVER admit they're worse off for having allowed the marriage to fail.
You are not alone in this! We ALL struggle to stay married because we're all imperfect people...every one of us. We all want our own way, we all want to change each other, and we are all selfish. If we acknowledge that and give grace to our spouses, then we're more likely filled with the compassion we need to make it day after day.
Sure, he's not perfect and won't listen to the therapist. But, he's been there by you for 19 years! That's ONE good thing about him! Also, he's been a wonderful dad to your daughter. Even if he's not the dashing romantic prince you want him to be, you have the satisfaction of having raised a gorgeous young girl ALMOST to maturity together. Isn't it worth it to preserve the marriage to see her off to a great future? Please don't undermine her now...she needs stability.
I don't think that by sacrificing yourself to save her, you're wasting your life or putting off some greater happiness. You are still growing, too. Doing this for your daughter will just make you a MORE beautiful woman.
At the end of our lives, no one will say, "She was a great romantic," "She was a great lover," or "She had a lot of fun." No! Those things are transient. People will say, "She was a great MOTHER," and "She was a great WIFE"! THAT is the real measure of success! A woman who invests in SOMEONE -a man, a son, or a daughter- who lives on AFTER her is the one who wins!
Yes, life is too short. Invest in someone OTHER than yourself.
God bless you, L.!
M.