AM I being overly jealous or this weird?

Met a guy for the second time. Second time I show him my family pictures and he points out my sister that he saw for the second time this time in picture and says your sister is really pretty, like I know my sister is pretty but I am the one you are trying to get to know and than you see anyother picture of me and say oh you use to be pretty. This made me feel so bad about myself.