Definitely possible the pill is affecting your sex drive. Depending on how long you’ve been on it, your drive may change/increase as your body adjusts. For some people, they say their “automatic” desire decreases (how interested you are in the idea of sex in general) but yet they can still feel plenty of pleasure when arousal does develop. I don’t think you should feel pressured to have sex for the sake of it, however, if you were interested, you could explain to your boyfriend that you may simply need more foreplay or certain activities to engage that desire. Desire may not be as automatic now, but you may still be able to feel it if you let him try to get you there.
I would say if your sex drive stays low, and you continue to feel dissatisfied about it, consider switching to another method. Or doubling up on methods like a condom + diaphragm.