If H and I eventually finally split, I KNOW I'll feel better about myself knowing I did all I possibly could. I think this is where you're at... having closure.. no questions and what ifs left to think about.
Sorry to hear this nm, but I agree with elvencat. If you've done everything you feel you could have to save the relationship, then you'll have no regrets about moving on.
Take a deep breath...then get back out there and find someone who thinks you set the moon. He's out there, wondering where you've been all his life.