Is it normal my sex drive is off ??

My baby is 4 months old and I’m exclusively breastfeeding. My bf got mad at me saying he isn’t trying nomore he’s tired of trying. I explained I’m tired we have 5 kids. I told him my sec drive is low. But he says I’m making excuses and I’m really not. We get intimate sometimes but sometimes I’m just not in the mood. And I told him we could watch movies together set up a date night together and then get sexual after but he doesn’t want to hear that. Is it normal my sex drive is low after my baby that’s 4 months?