Boyfriend doesn't turn me on anymore.

I've been with this guy for 2 years now and at first we'd have sex daily. But as we moved into an apartment together we are always alone and I am just not turned on by him. I mean I just won't wanna have sex with him. I used to love it. But it's always about him and I've told him the truth and he gets upset. Instead of trying to change stuff or spice it up he gets upset thinking I don't love him. But I do. I just want things to go back to how they were. But I'm not sure how to.