Culture differences - desperate for advice

Alright so i’ll keep this short. I’m white and my bf is korean. I don’t see race and never did. I don’t like certain races over one another. I just see a person. My parents are in an older mindset but they’ve started to realize that they should just be happy that i’m happy. So the issue is not on my end. However, the relationship is pretty new and i really like him, i’m just terrified of getting my heart broken later down the line if i fall in love. For some reason, i get the feeling that his mother is not happy with him dating someone not in their culture. I met her very quickly, i just said hi and smiled and she seemed really nice but ever seen then i’ve been feeling a weird feeling from him. I plan on straight up asking him next time i see him, but i just wanna know if anyone has any advice???? I also get really sad when i see a korean girl cuz i always think maybw he’s better off with her. or i think about his ex who i know he loved who was asian and definitely saw a future with her. it’s really messing with my psyche badly. I’m worried he doesn’t see a future in this and just is doing it to pass time. I don’t know what to do. I really really like him. Sometimes i feel like breaking my own heart and breaking up with him because i’m terrified. Please i’d take any advice i could get.