u/Batmans_sidechick

I (black) have been with my bf (white) couple of months and he has shown me multiple times he is serious about me and he loves me and only me. But everytime we come across other black girls i can’t help but think he is probably thinking he chose the wrong one and there is prettier people. My bf is a really good looking guy. I have never told him about this even though he reassures me all the time. How do I overcome this?