How do I get my sex drive up? Help!

My SO and I have been together for two years now. We are basically the same person and have discussed/are on the same page about having a future together. Only problem in our relationship is how often we have sex. His sex drive is pretty high, and mine is almost nonexistent. We’ve tried many things to get me in the mood more often (toys, lube, going off birth control to get rid of those side effects, being more spontaneous, etc.) but not much has worked. I hate to see him disappointed when I’m turning him down, but at the same time I don’t want to give in and have sex with him when I’m not in the mood just to please him. How do I get my sex drive up more?! This is causing issues in our otherwise nearly perfect relationship and I hate it. ☹️