ADVICE NEEDED.

Taylor
Alright. So my boyfriend and I have been together for almost a year and when we first got together it's like all we did was have sex and it was amazing. But I go thru these phases of not being horny for weeks at a time. I love my boyfriend and I just feel so guilty whenever I'm not in the mood and he clearly is. 
Is there anything I can do to make myself want to want it too?