I accidentally hurt physically one of my plates and I acted like I didn't gave a fuck, she got REALLY pissed off, like, for real, no bullshit (I think so). But now the guilt is starting to show up, we are really rude with each other just for fun, but now I think I crossed the boundary. I feel really bad because it made me feel like a real dick, not a cocky-cool-dick, so I want to apologize, but how should I do it?