Search Results: go from a friendship to relationship

Long story made short. My brother's best friend (for 8 years) had a crush on me for awhile, which I kinda did too. In July (after a turned 18) I decided to move to a different state. He found out that I was moving after I moved out and was able to get my Snapchat from my brother. We started talking and I realized that all he wanted was for me to move back and to date him, and I realized that all I wanted to do was to be friends with him. So I decided that the best thing to do was to friend zone him for awhile so that I would not accidentally get into a long distance relationship. He got mad and made me feel so bad about it that I took it back. Things went back to normal, but I was not happy about changing my mind. So later I friend zoned him, he got super mad, didn't talk to me for a couple days. Then kinda talked to me. We didn't really talk for a month, which I tried to a couple times and he refused to really talk. Then on Thanksgiving (while I was on vacation visiting family) he demanded an hour which I politely told him that I was busy. Then the Monday after Thanksgiving he send me a message breaking up the friendship. That was my last night on vacation and it was not a great way to end the vacation.
I am having a really hard time understanding why he wasn't who I thought he was. My brother does not really understand what happened and he still hangs out with him.