You're doing amazeballs! I say just make smaller goals, 1 day at a time even! You might feel like you can't face another week of it but somehow just one more day might be manageable, and then that day passes and so on. And if you have a good supply built up maybe drop a pump every now and again just for a break. It might reduce your supply short term but possibly keep you going longer? I think each feed you can give bubba is a gift, you've already given so much and should be super proud of yourself!
I can't express enough how amazing I think you are. Breast feeding alone takes enormous commitment sometimes but to express full time is going above and beyond! Your baby is so lucky!