Do you ever feel like you don't need sex?

Virginia
I've been with my boyfriend for six years. We have two children(1yr old and 2 mth old). Ever since I had my second I just have no urge to have sex with my bf. We are protected and I don't hurt all that much. He just wants to hop right into sex as I need to get into it. He is always wanting BJ's and I HATE BJ's. He really worries about him getting off. I just can't get into sex anymore....And I've been fine without it.