My sexy drive sucks

I’ve been with my boyfriend about 3-4 years now and tbh out sexual chemistry has never been the greatest. But I want to say the last year or so my sex drive literally been like a 2 out of 10. I never have the desire at all and most times when we do have sex I just pretend to be into it. I’m not sure what’s wrong with me, idk if it’s something I’m doing wrong in life or is it him or is this normal ? I feel bad because I know he wants more sex and he’ll drop hints or complain here and there. How can I boost my sex drive?