Sex isn't a chore.

So lately when I've asked my boyfriend if he wants to have sex he groans like its this huge bother. Well today I got extra offended and turned away. Well he turned me back and said "fine, let's have sex.." Like he doesn't understand that he's treating sex like a chore and its hurting my feelings. I'm done asking him. I always offered because I thought he'd want to but I guess he never does. This is causing us to fight during the day because I can't help but feel like he's getting it from someone else. What would you think?