having huge problem

My bf doesnt not listen to anything i tell him about my life. Im not full of myself and always listen to what he says. I may forget stuff here and there but i remember what he said. My bf for the past month has not listened to anything i say. I say im going somewhere tomorrow to volunteer i said it at least 5 times its on the calendar and he accuses me of never telling him. He just doesnt care enough about what i have going on. Im kind and alway listen to what he is. I honestly camt deal with it. I feel like anything in my life is so unimportant to him. What do i do? This is hurting me so much. He claims he forgets easily but he remembers quotes lyrics and anythibg regarding himself. He is full of himself and  im finally starting to see it. He claims he has adhd but has never been diagnosed but still it hurts me