Search Results: relationships from friendship

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.

I know many guys keep female friendships wether they are in a relationship or not just in case there is a chance with one of them.

Not all guys do that but a great number of men do this (keeping friendships for the chance of a possibility with them)

Well I am in a relationship but for some reason or another we had kept breaking up and getting back together. Now he says it's very serious and wants to make a family with me and just be serious with me.

I have one guy friend who said he would marry me, I keep in touch with him and my boyfriend does not know about him, but today it kind of slipped out into a conversation and he got mad with me and wants to know what i talk about with him and why i'm even talking to him in private chats etc. and I felt scared to I deleted and removed everything about this friend because i don't want to ruin what I have now..

but I somehow feel it's wise to still keep him around not cheating but just in case my boyfriend and i split, i have someone as possibility.. I don't like to start from scratch looking for someone and this guy could be back up

it sounds bad but really would you guys do this?
even if it sounds bad, maybe it's a smart thing to do?
I'm not going to talk or flirt with him but just keep him as contact/friend

What do you guys think?
Advice?