Is it really a bullying act or am I overreacting?

I cannot definitively state that this is bullying, but I am tremendously angry and frustrated as a result of this experience.

It started very recently, when my male university groupmate abruptly began to interrupt me anytime I spoke to someone, occasionally calling me names (not so harmless). For example, when I’m expressing to a teacher my dislike for the local library, he starts talking over me about how much he likes the library, and even though I didn’t actually finish talking, he kept going with his speech. When questioned about why he wouldn’t stop, he simply stated, “Because she had ideas that were contrary to mine.” In another case, if I’m talking to someone and don’t truly stop, he starts to stop me by repeating, “Enough, enough.” He is not in charge of me; therefore, he cannot say such things.

When I confronted him about it, he merely laughed and claimed he would not apologize since he did not consider his actions to be wrong. He just has absolutely no reason to do that.

Nobody appears to think his behaviors are malicious; no one tried to stop him, and I even cried in front of him to make him feel uncomfortable. I’m not sure why he’s doing it. It just seems unreasonable.

My apologies for the errors, as currently, I am not in the right mind.