Why did he behave like this?

A few months ago, I add him on Orkut. Then sometimes we chat on gmail. Then recently I added him on skype and FB. Anyway, we recenlty do video chat on skype everyday but lately since I made comment on a picture, he has not come to chat and he has not replied to my offlien message. After we had argument abt a lie he told. Anyway today he contect me on gmail chat. Then he is telling me to come on Skype. So i told him i was already signed on. He said he did not see my online so I re-added him. He said he still did not see me. Anyway i think i spent about 20 mins trying to fix that problem with no success. so he started telling me how maybe I am busy with all these guys online. So I asked him wt he means. He said that I was enjoying them. He said he notice I am making comments on pictures on FB. He saw my comment on a picture because we are mutual friends. So i said to him why that was a problem, he said I needed to ask him permission to add his friends to my list before adding. So I said that I did not know I added his friends until after. He got upset and using profanity and said he thought I was a good girl, and that he thought i was his best friend. He got into argument about he I added him from orkut (which by they way I did not even remember that it was me who added him there). So then he said he will delete me from his FB. so I said okay.Then I told him he was a liar, because if he is deleting me from his FB list, then that means he blocked me in Skype. And that’s why I could not contact him there. He said no, and I told him that because he was angry, he blocked me and lied abt it. He told me he was watching my comments on guy’s pics for past few days on FB. I told him they were friends, so why tha tis a problem for him. Why do you think he got upset abt that? (he’s not a bf. just a friensd)