I didn't read the other replies simply because I wanted to put my unbiased opinion on here.
Porn, even sexual sin in general, seems to be a sin that is set apart from others. What I mean by that is that it is a sin that is impossible to overcome without support, prayer and a lot of healing from past sexual sin.
I've looked up to my earthly father for my entire life. My dad was my hero, so wise in the word and always who I went to for advice on anything in my life. He always knew where to point me for spiritual advice, scriptures and never gave up on me when I walked away from God.
Then two years ago, my dad confessed to me that he has been addicted to porn since he was a teen. My mom knew about it, and stuck next to him for 25 years of marriage until she died. When my stepmom found out, she kicked him out of the house and nearly drew divorce papers. When he told me, it wasn't the porn that bothered me, it was the lies. The fact that he had been putting on the "good ole' boy" show for my entire life, and specifically the last twelve years of his and my step-mom's marriage.
I'm not excusing porn at all. When I find a man, I will hope and pray that he hasn't fallen victim to it. But I will approach it with some standards. Porn can be overcome with accountability, prayer and support.
I'll be vulnerable enough to claim that I have also dealt with pornographic sin as well. What helped me was reading an article about women in the porn industry. What men don't think about, because it's instant gratification for a "need" they have, is about how these women are exploited online, in books and magazines...and have such a low sense of self worth that they may not know how to ever get themselves out. By thinking of the women who need Jesus so desperately, it has helped me for nearly three years to be able to say "no" when I feel I want to, and turn to prayer to get me through those moments.
I'm not sure what happens in the mind when the urge comes, but I do know that with support, accountability and prayer, it can be overcome. My dad was able to give it up for my mom for 25 years, even when the romance "died" in their relationship. Through two years of counseling and a lot of hard times, he and my step-mom have been able to overcome too. It isn't easy, but from his example, I've realized that it's not impossible to be in a relationship where porn may be (or has been) an issue.
I hope this helps. I'm sorry it seems like a desperate situation, but I completely understand. Because I've been with those men too, and it isn't easy. But God can overcome all obstacles, and nobody is perfect. Porn is a vicious demon that seeks to eat away at the soul and heart of any person or relationship. But it doesn't have to win.