(25M)My GF (24F) broke up after 6+ years because I saved sexy snaps of her best friend. Am I just messed up?

Been with my girlfriend for over 6 years. She just dumped me instantly after finding out I had saved some explicit snaps of her best friend.

I don’t even like this friend emotionally honestly, I think she’s a terrible person. But she’s physically attractive, and sometimes she’d send insanely sexy snaps. I saved them because I’m a sucker for hot photos. Always have been since my teens.

I never wanted anything physical, but my GF always suspected I liked her friend. This confirmed it for her.

I get that I’m not blameless here, and I feel guilty. But I’m also wondering is this kind of obsession with sexy photos normal? Is it something I should see a therapist about? And is there even a point in trying to win her back, or is this relationship done for good?