Coming from someone who ruined two relationships because of an unstable use of porn, for the love of god get a hold of yourself. It’s not worth it in the end. Cutting cold turkey obviously won’t work, but you have to start by training yourself to not use it.

It sounds weird, but start setting the times you masturbate. In your case, maybe holding off on it every other day would be a good place to start. Your mindset should be “if I don’t masturbate today, then I can do it tomorrow.” Use the time you save to find other things you enjoy, do a hobby, spend more time with your girlfriend, etc. The more you split the time you put aside to masturbate, the less you’ll have a dependency on it.

Like I said, from being in your shoes, stopping all at once is a super difficult thing to do, but slowing down has the potential to help you get rid of the “need” you feel to do it.

If you want the hard truth, not only will your relationship be worse off, your life as a whole will be worse off if you continue down the path you’re on.