My (19f) boyfriend (21m) is obsessed with how “genetically rare” he is

My boyfriend of about a year is obsessed with how "genetically rare" he is compared to all other humans. He constantly reminds me that he has "the rarest hair and eye color" (blonde hair, blue eyes) and that he is also rare because he's tall with AB Negative blood, whatever that means.

At first I didn't mind when he said these things, but now it's starting to get to the point where I feel worthless and not rare myself. He literally told me today that he is "one in a billion" and "so much more rare" than my past and future boyfriends. I was worried when he said "future boyfriends" since I love him, but he just said it would be impossible for him to be replaced.

Also, I don't know if he's approaching the territory of racism, because he also has said "my people will be extinct soon, and nothing but Africans will exist". He kinda shocked me by saying that, and I'm still trying to wrap my mind around it.

How do I move forward away from this subject with him, so I can start feeling better about myself?