What should i do?

bubbles
Something happened when my boyfriend was at work last night. I asked him how work was and he said it was bs that alot of stupid things happened. I've been trying to get him to talk to be about it, but he just won't. We promised to tell each other things. But it seems that I'm the only one doing so. I want to know what's wrong but scared if I ask again he'll get mad....he even stopped texting me but was on Facebook.... idk what to do or say anymore...what should I do?