Follows other physically attractive girls on snapchat. We are 25, in a stable relationship, great man.

Just last friday, I saw he added this one girl on his snap chat and I got sooo bummed. Big ass, big boobs, skinny, flat stomach. I mean, model status. I don't consider myself ugly at all and I think I have a pretty nice body but nothing compared to her. I made a comment and asked him why, what caught his attention and he didn't say anything. In fact, he hasn't said much. Just he doesn't know why...I let it go and carried on with ny business. But now I can't help but feel a bit insecured. Anyone else?!