A picture is just a picture

So I have always kept pictures of my past friends, experiences, trips, etc. Also included: pictures of my past girlfriends. I’ve been dating the same girl for almost six years now and I love her more than anything. However, she says the fact that I keep these pictures hurts her feelings terribly.

I have not had a lot of girlfriends before her and the pictures have no sentimental value as far as the girls are concerned. Basically, they just remind me of my high school days, prom, and stuff like that.

I never look at them -- they are stored in a box in my closet. I just know that one day down the road I will be glad I have them. I imagine showing them to my kids and laughing about how ridiculous I probably look in my tux. Is it fair for her to get so mad at me for keeping these, and to ask me to throw them out?