Breastfeeding? Advice please 😭❤️

I’ve been considering bringing our breastfeeding journey to an end. My son has been exclusively nursed since he was born. He recently hit 12m and I always told myself I would go for “as long as my body makes milk” or “until he decides he’s done” whichever came first. But for the last 3 months I have been struggling with BF so much. I’m exhausted, he doesn’t sleep through the night because he wakes up to nurse but then immediately falls asleep at the breast. One breast started producing less milk when I got mastitis around 6m and for the past 3 months it barely produces anything at all. He refuses to latch on that side, and if I try to pump nothing comes out. I know there is still a little milk production because if I hand express it sprays out. Either way any milk he gets is from the one side that supply was unaffected, and my nip hurts from 3 months of nursing 10-12 times a day and night, on that one side. He is a wonderful solids eater, absolutely loves foods, but still wants milk all the time. I am just beyond tired of nursing, but I can’t stop thinking about all the immune benefits for him to receiving breastmilk. That makes me want to keep sacrificing and stick with it. Pumping is not an option, I absolutely hate pumping and keeping up with the parts (props to all the exclusive pumping mamas out there) so I would rather continue to nurse then to try pumping. I feel extremely conflicted. I don’t know how to sooth him without nursing either. In my gut, I want to quit. But logically I feel like I should keep going, I just don’t know if I’m causing myself more harm than I should be. I’m getting to a point where I am worried I will hate nursing, but also feel incredibly guilty at the thought of quitting BF. Please share your advice and experiences. Maybe some encouragement?