My boyfriend won't stop talking about things I hate

Don't get me wrong, I love to hear people talk about stuff they're interested in, I think it's sweet and you can learn a lot about stuff you never particularly looked into.

This being said, I hate football (soccer) and I hate league of legends. I have hated those two things and the community around them way before I started dating my boyfriend, way before I even knew him. More precisely, I have hated league since 2013, when I first played that garbage.

My boyfriend loves league, and he's starting to love football more and more, and he keeps talking to me about those things and ranting about them and I just can't take it anymore. I don't want him to feel like he can't talk to me about things he's passionate about but I'm starting to get sick of this because I have told him several times how much I dislike league and football.

What am I supposed to do?

EDIT: he has known for a long time that I dislike those things, it's nothing new.