Ask mistaric!

Basically I have begun to really really like my guy friend. I am 13/f. He has gone out with 3 of my girl friends but they always dumped him because they stopped liking him. I have liked him for months now and seriously think about him 24/7. We flirt alot and I was wonderring if you have any ideas on how to tell if he likes me other than just asking him. These are things that he does that make me think he does like me:

I catch him staring sometimes and when I do he'll smile back and stick out his toungue (i know childish)
I am of mixed race and when people bug me about it and call me names he'll defend me and get them to stop
Sometimes he'll trip me for no reason
He always says hi to me in the hall
When we talk we have total eye contact (never wavers)
When we talk we'll usually end up shoving eachother and touching eachother
When he says something mean (even if it was a joke) he'll say sorry afterwards
If he's talking to the guys and I walk into the con he'll acknoledge me immediatly
he shows concern when im upset and kind of demands a reason why and such
Sometimes he'll put his arm around me for no reason

Reasons I think he doesnt:

He flirts with my friend who dumped him last year
If people say we look like a couple he'll suddenly run away
If people say were flirting he'll yell something like "Stop Flirting With Me" or "AAH Shes trying to Rape Me"
We walk to our buses together and whenever he approaches his he'll see the guys then run away screaming
He says rude coments when people say "we should just go out" such as "Oh ya like Shes sooo wanted" in a mean sarcastic tone

I have no idea if hes just being a good friend or maybe likes me! Any signs? How could I find out?

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