What should I do

I been dating this guy a year and he tells his friend while I’m there he thinkn bout marrying me and making me his second bm ...then his friends like y’all goin make pretty babies and my bf like yea if they my color 😑 I’m medium brown and he’s light skin . His first bm is light skin and they babies light . His friend was like y’all goin have cute caramel babies . And I’m like yea they’d be in the middle ....but I’m mad bout it like wtf wrong with being dark ?

Do I Breakup with him or just don’t give him any kids in future