My grandparents suspect my cousin and I are dating?

haha sorry but your parents/family are just so old school in their thinking. Maybe back in their homeland was a big problem but in today's America it is perfectly normal for cousins to be super close. Maybe this cousin of yours needs to get a girlfriend or you should find a boyfriend, that would squash all of this. Then your family would just get on your case about your bf, you are asian, this will never end, your family will always be up in your koolaid about boys (sorry for that one)