Sex drive on and off

My boyfriend and I are both 20, we do have busy schedules with work and I’m in school as well, but we always make time to for each other. With that being said, he’s always in the mood and very lovey, however I’m the opposite. My sex drive comes in spurts and there are sometimes I don’t even wanna be touched. We’ve been together for over 5 years and this has been going on for a good while. We change things up and that seems to help: different foreplay, new positions, showers, toys, teasing. It’s seemed to help the past few months and I’m still looking for other ideas to try! Thank you!