So tired of my bd and his mom

My bds mom lives 5 hrs away from us. She hasn’t come down to see her grandson in 3 yrs. The last time she was even down was for his gender reveal 😂. I have driven up there over 30 times for her and my bd. I’m explaining to my bd I don’t want to come see her no more until she comes down to see us. He is soooo mad saying that I’m selfish. He will not hold his mother accountable for ANYTHING!!!! I’m ready to leave him over it. It’s been an issue our whole relationship. That and other situations where he let his mom disrespect the fuck out of me. No matter how much I try to talk it out he gets a bitchy attitude. I just want him to leave.