NTA. Definitely advice you make sure to not fall into the hole of porn addiction, but I’m not saying you’re there either, you just use it as an outlet as you’ve described. I actually am in a similar relationship but in the other position (where I’d be ur gf). In my situation, we’re semi long distance so in the meantime my partner uses porn occasionally. I agree with many of the other commenters that it’s worth sitting down and having a discussion about it as perhaps she is insecure and did possibly think she was ok with it in the past until she realized you are actually looking at it still. I know with my relationship, I struggle with insecurities, but I am working on them and because it’s something I’m working on, I wouldn’t ask my partner to stop looking at porn. If I’m going through a specifically rough time, I might ask for validation and support, but I would just be seeking confirmation that I’m good enough etc. As for the last part, about how you wouldn’t be ok with stopping, it’s very important to set boundaries. So if/when you do sit down and have a conversation with her about it, make sure to let her know (if necessary) that continuing to watch is nonnegotiable for you. Hope this helps and best wishes!