My addiction got much worse after getting engaged/married. I'm not blaming my wife for that, but life threw a lot of curve balls my way. Had I been single, I would have had more "action" than I did married, or at least it would have been an option for me, being married and not being willing to physically cheat, I was in virtually a sexless marriage, with no way out. Regardless of my relationship status though, my addition was more about other issues I was going through, not an urge to have sex. Though at the time I thought that was all it was.. it's perfectly reasonable, because it feels like the issue is that you desire sex and having a partner will solve that, it wasnt until I started NF and especially hard mode that I started really learning what was causing my addictive cycles, many of them and really most of them would exist regardless of if I was married or not.
Marriage is complex and is not anything like what Hollywood would like to portray. Add a few kids in, bills, work, body aging, health changes, fill in the blank, and you can find yourself in a position that you didn't picture marriage would be like. Once there, you can essentially be in the same position trying to remove the addiction "hard mode" style in the same way you would when single. Only this time you've got a partner, who adds to your stress rather than helps. Best thing to do is address the addiction now. IMO hard mode is the best method for change. It's not easy in the sense that you will have days where you feel you are going crazy. But you'll be in a much better place in time.