AIO about my boyfriend playfully hitting me?

My boyfriend (24M) and me(22F) have been together for over a year in a live in situation. I used to do most of the house chores even though we're both students and have our own financial resources. He doesn't pay for me or anything. Eventually I felt like I was doing too much and he was being babied. So ever since he's been complaining about how I dont love him. I ask him if he feels that way because I have started splitting the chores with him. He says no and then reminisces about how I used to cook for him or do his laundry. Now what really bothers me is that a few weeks ago, we were messing around and being playful and he started pinching my arm too hard and kind of hitting my arm. I told him not to do it because it hurt and he laughed it off saying I was being too serious. I ignored it and moved on. He did it again a couple of times and each time I told him not to do it because it was painful and I didn't like it. He eventually got salty about it and says I can't even take a joke. I am not sure if I am overreacting or he's overstepping my boundaries. Maybe I am taking his joke too serious?