Porn and sexual fantasy is just like any other ....... It can be habit forming and destructive. There are many examples on this site. If you can't face REALITY and NORMALCY when such is required, then you have a problem. Sexual addictions whether real, imagined or lived via porn can and often do destroy relationships. If you get nothing else out of this then hopefully you've learned this. Your situation is a bit different, but you know you clearly need to change your approach, but you don't seem able. If this doesn't describe you, then I've mistaken the situation. Best of luck.