He thinks I'm mean now what do I do ? Please!!!!?

So me him and this other guy were just about dump stuff and my crush said I'm mean he had this smile on his face like he was teasing me but I don't think he was. I'm not a mean Person but when I get other him I get nervous and scared so I say stupid things how can I change that and Shed my mean girl Image from him?
He thinks I'm mean now what do I do ? Please!!!!?
Post Opinion