My girlfriend (18f) told me (18m) that I'm average looking but thats fine since she prefers it

I've communicated to her before that I have bdd and have never once not called her pretty beautiful gorgeous. I have also communicated that I hate being compared to other people since it triggers my bdd. This first came up 1 time before we started dating, I was discussing with her how someone had a crush on me and she said "a lot of people seemed to have crushes on you" I said "I guess?" She replied with "I don't see why, you're average looking". This got brought back up today. We normally have very good communication and she compliments me a lot but this does make me worry, any advice is appreciated. Also we've been dating for about 2 months now.