Insecure about another race

My partner was in a marriage with a person from a completely other race than us. I am not racist and never have been, but I can’t stop this feeling of getting insecure every time I see a woman of this race. I tell myself how completely different I am from that type of woman from my skin to my body structure and that there is no way I fit that “type” that he must really be into. Everyone has a type. I just want to stop getting uncomfortable every time I see a woman that fits that ethnicity. I’ve never felt that before I got with him.