What do I do about my boyfriend?

Okay so here's the story. I am or was in a long distance relationship with a guy. He told me to get skype today, so I did...so we chilled in skype for a little while and then he wanted to join vent (ventrillo, a voice sharing thing) so that he could talk to some of my friends without using skype. Okay so he was on vent and we had fun. Then, one of his friends calls me on skype, so I accept of course and he asks me a lot of questions whatever really. My boyfriend then gets pissed off and tells me to get off of skype for an unknown reason. He tells me about 5 times and I just want to be polite and keep talking to his friend who just doesn't care. My boyfriend then leaves the vent pretty much and I try texting him. He's pissed and won't tell me the reason. So then I try talking to him about it and he blocks my number so I have no contact with him, yet he still refuses to tell me what broke us up. I am crying and completely hurt...he won't tell me what's wrong and I might never talk to him again and i'm in total complete love with him.