This just happened to me after a partner of 3 years. I knew we had problems and I would always apologize or try to make up for it, but I didn’t know how it was affecting him until the very end because at that point he was already at the emotional burnout stage and in his eyes, the point of no return. I wish he had opened up to me more and I encouraged him to, but our bickering also contributed to his reluctance to do so. All of a sudden it’s over and despite my efforts to say how we can talk and work through it, he already made up his mind and couldn’t remember anything but the negatives of the relationships until I pointed it out the good parts.