Hormone problems?

Ok so I've been sexually active for a few years, but I'm never really "horny". Like I love sex with my boyfriend, but if I had to chose, I'd rather watch tv, or sleep rather than make out, or do something sexual. Some people say it's the guy, but I'm totally in love with this guy, like he's THE ONE. But even when I had other boyfriends before him, I was never turned on. Help?