Question..(need advice)

McKayla
Okay..so there is this guy I really like. He's 9 years older than me and I'm 19. I told him I wanted to take things slow. But then, he held my hand (which I was okay with) and then kissed my cheek (kinda iffy about it). I told him again and he said 'I just want you to be happy.' So I was like cool he understands. But when I was at church with him, he grabbed my butt. I told him that if he ever does that again, he will be slapped and would have to deal with my brother. Was I wrong for saying that?