Why did my boyfriend pretend to put me in a headlock? Am I just being sensitive?

We were at the cafeteria and I was sitting at a table and he was standing. He suddenly pretended to put me in a headlock and he made a crunch noise. I know he wouldn’t hurt me but for some reason I felt scared and embarrassed that he would do that with people around. It felt disrespectful. I said “Don’t do that again, it makes me feel weird” and he just looked around distantly and said “Why? it’s just a joke” and walked away to get food.

At the beginning of the relationship he did this a few times and would pretend he’s about to punch or kick me. I would tell him to stop and that it scares me, so he didn’t do it for like a year until this time recently.

Is this normal? Why would he do that?
Why did my boyfriend pretend to put me in a headlock? Am I just being sensitive?
Post Opinion