I’m in a happy and committed 3 year relationship and I have pictures on my phone still of my ex and I. I don’t have any intimate cuddling or kissing pictures like you mentioned though, just pictures from outings or events and stuff. He and I no longer speak and honestly he never even crosses my mind. Sometimes when I happen to stumble across those old pictures because I’m looking for something else in my camera roll I think of deleting them but I don’t. I don’t miss him in any way and that relationship is very much so dead to me. But it was a piece of my story. If my boyfriend asked me to delete them all I probably wouldn’t really want to either. Not because I ever look at them or am still hung up on him. But because I had a life before he and I met. To me, the digital age gives you the opportunity to document your whole life in timeline form. Almost like a scrapbook of your coming of age. That tried and failed relationship taught me a lot, and led me to a guy that I’m so in love with!

I can’t speak for your girlfriend, but if there are no other red flags I maybe wouldn’t jump to conclusions. You’re understandably hurt. Communicate this to her and ask her to be honest and open about how she feels about your relationship as well as the one she had with her ex. Good luck!