My boyfriend got rlly upset...?

my boyfriend got rlly upset last night cuz he said his dad did something i dont know what he did cuz he wont talk to me about it then he kept making fun of our homeroom teacher and well yea... i rlly wanna cheer him up and talk to him whenever i try he doesnt respond but whenever this other person talks to him he does respond somehow i feel i did something wrong (we're all on yahoo messenger)