I still don't feel actually remorse for supposedly bullying my ex boyfriend's half-sister, is this bad?

This was in HS and she's still affected 8 years later. We're already 26 year-olds and my now ex boyfriend found out when he caught me dumping her rice pudding and laughing during an argument. The reason I'm not even apologizing is because if I do it, it'll just be to try winning him back, no other reason.

I mean yeah it wasn't nice but I don't really feel actual remorse, the ''oh will you ever forgive me type'' thing. I don't feel that. I don't really understand from her point of view. I can't even think of a moment I've ever ask for forgiveness nor apologize to anyone. The only time I've ever said sorry was if I accidentally step on someone's feet at a supermarket or accidentally bump into people but not apologize for other bigger things.

Is this bad?

I still don't feel actually remorse for supposedly bullying my ex boyfriend's half-sister, is this bad?
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