My boyfriend says I don't listen

I just got into a huge fight with my boyfriend of a year and a half and he says I just don't listen. He says I hear what I want to hear but I just dont ever remember him saying what I was supposed to know. This had happened a few times and I will go over the conversation in my head and what he says and what I remember dont add up. Ill say you never said that even though he really did. I was wondering if this maybe had something to do with ADHD or some kind of other maybe mental disorder? Im super healthy and never had any other health problems. I feel like Im the crazy one!