So I [16M] was reading on my computer, while the door of my room was open. My older brother [19M] came into my room, and slapped my forehead, so I stood up, and smacked him on the head, it was waay harder than his slap. Then I asked him why did he hit me, he told me to sit down and left the room, only to come back a few minutes later, with some money I owed him, as a way of telling me he doesn't want to talk to me anymore. I don't know what to do, we usually don't get physical, but I couldn't resist my anger. So, Am I the Asshole? Should I apologize?