What Did I Do?

So I had my English final today. It was easy. After the final, Kyle and I went to McDonald's for cheap food and someplace to loiter. We were exempt from the econ/gov final so we hung out. We needed some time together to just talk and bond like we used to. Bambi called me when he got out of the exam to see if we were still at McDonald's. I missed his call. I saw I missed it and called him right back. I tried his cell 3x. I got a voicemail everytime. I gave up and continued to talk to Kyle. 5mins later, Bambi walks in. He comes over to our table and says "hey. Thanks for picking up your phone and stuff". Then when I explained that I called him 3x, he said that after he called me, he had turned his phone off because it was dying. I was getting frustrated. I said "well how the fuck was I supposed to know your phone is dying?". He gave me an angry face, turned around, and stormed out of the place. I felt so embarassed. Like he made me look like an idiot in front of Kyle and the rest of McDonald's staff and patrons. I looked like a retard and a horrible person. Kyle saw I was a bit ashamed and we continued to talk. Maybe 3mins later, Bambi comes back. He entered behind me. I turned around to look at him and he threw a bottle at my head. It missed and hit the table then bounced to the floor. That got me a bit scared and angry. Why the hell would he do that? I don't see that I did anything wrong. Even if I did, that still wouldn't be right. From then on, the day with him was uncomfortable. Around our other friends I was ok. Around just Bambi, I was quiet and sad. I just told him that I was tired. I didn't want to fight. I went home and made a bagel. Leo messaged me on fb and after talking for maybe 20mins, he knew something was wrong. He asked and I denied. I eventually gave in and told him what had happened. He was upset and empathetic.
After speaking with Leo, I engaged Bambi. He got defensive and said he threw the bottle at me to scare me. Yea. Ok. Whatever. Now he wants to talk about how I feel and why I feel that way. We may talk tomorrow before our Math final at 9:30am. I don't know why, but I'm so depressed right now. I just want to sleep. Forever.