My boyfriend is bipolar. No meds. was frequent and often and now has deminished to almost never. Help!?

We've been together for almost a year. We have never had an issue with or the desire til about 2 months ago. I have a very high drive and so did he....till recently that is. He is not on any meds for bipolar disorder and doesn't seem to have any symptoms except insomnia. I love him with all my heart. But I sometimes I feel like the problem is me. He says its not. He says sometimes he wants it all the time everyday......then he says he goes through phases that he has no desire for it at all. I crave his touch and sensual carresses. He is the iest man on earth to me so i want him badly. He moved in with me on 6/1 and we have talked about it. I am trying to understand and deal with it. But I crave him. What should i do?