Much higher sex drive than S/O

I tend to have a very high sex drive, at least once a day is ideal for me. I understand that may be asking a lot for some but my S/O says he doesn't NEED sex and doesn't care much if we don't have it. If I don't initiate it, we'll have sex maybe 4 times a month at the most. This is really becoming an issue and I've tried everything imaginable to light the spark again. He swears it's not because I gained weight or anything like that but I can't help but feel very unwanted. Any advice?