Low sex drive TTC

Hello, I need some advice. I use to have a very high sex drive but after a few relationships that pretty much demanded sex every day my sex drive has plummeted. My and my boyfriend are TTC and he isn't as pushy about sex as my ex was but I feel like even if I want sex and he pushes it on me to much I lose all my want to have sex. He definitely has a higher drive than I do and we have had fights and talks about it. I really want to get pregnant but if we aren't having sex that isn't happening.. I don't know what to do about my sex drive being so low PLEASE HELP!