hitting

my boyfriend thinks it's perfectly ok the hit or slap me whenever and wherever he wants because it's "playful" and most of the time it hurts me. like my boobs will be sore and he will smack them.. so j ask him to stop but most of the time he doesn't or says I forgot they hurt.. well anyways he says I should stop being so mean to me and I said well I'm only mean when you hit me or hurt me and his excuse is well you should stop being such a baby. and when I asked him if I'm the only one in the wrong and he doesn't do anything wrong he said yeah he doesn't do anything wrong. I don't like being hit and I have asked him all the time everyday to not do it. he doesn't hit me in my face or any th ing just usually anywhere on my body. he says I'm the only one in the wrong for being mean to him or if I tell at him. I only do it when he treats me horribly.. because I don't feel like what he does is right.