I don't think porn caused your marriage problems. If I followed you correctly, you resorted to porn once you stopped finding your wife attractive, which itself happened after she's rejected you once too many times. It seems to me that your marriage problems caused your reliance on porn, not the other way around.

Sex is a requirement in any monogamous relationship. If two people pledge exclusivity to each other, both people implicitly accept the duty of taking care of the other person's sexual needs. Given this fact, your wife's behavior counts as a breach of contract and you should consider leaving her.

I realize you want to be there for your children, but a miserable father in a malfunctioning marriage isn't going to do them any good. I think they'd be better off with a happy father who has shared custody.

Given that your wife changed her behavior after marriage, I think it is one of two things : - you let yourself go after marriage and she doesn't find you attractive anymore - she was ready to settle down and she put out the big game to get you to marry her even though she doesn't find you that attractive, so when she got you locked in a marriage, she doesn't feel the need to make an effort anymore

In the first case, I'd say it is your fault. But you were a Marine, so you do know about physical exercise. Join a gym and get back in shape. You said you don't find her attractive anymore either, so maybe she also let herself go. Join the gym together. Find the time, even if you're busy. It is worth it, if you want to save your marriage.

In the second case, it is her mistake. Your problem in this case is that she now takes you for granted. And you, being unwilling to leave her isn't improving matters. It might sound contradictory, but you have to be willing to walk away; your marriage depends on it. You could tell her that, but it is better to demonstrate it by acting independent. Don't let yourself drown in your marriage. Pursue your dreams, reconnect with your friends, find a hobby and join the gym. Work on improving yourself. You will be happier for it and she will value you more. Stop begging for sex. Once she sees the new improved you, she will come to you. And take command, women love a man they can depend on and trust enough to follow. Be that man.

If none of this helps, then hire a lawyer and find out what your options are. Family courts are a nightmare and divorces are expensive. But you know the joke, they are expensive, because they are worth it. Anyway, that's my two cents. Wish you luck.