My ex was soo mean to my crush today?!?!?

he's been my ex since december and he broke up with me, over a freaking text message. I was sitting in my desk during homeroom and my crush scooted his desk to mine and we were talking. my friend said she saw my ex look at us and "snarl". Then my crush, me, 4 of my friends, and I were playing this game that you pass around. my ex sat next to my crush who sat next to me. every time the ex was supposed to pass it to my crush, he'd throw it at him!! my crush is from germany and his english still isn't very good. so when it was his turn to say stuff, it took him longer. and then my ex would be like "jeez hurry up already. how slow are you??" and my crush is sooo sweet. I wanted to say something, but if I did everyone would have made fun of us. why was my ex being such an a*s? He broke up with ME :/