Im always teasing this girl to death, and she playfull hits me. In the arm or gives me a slap. is it consider a I.O.I?

You say always... That means that you know her. That makes this far beyond a regular pickup. Thus you are in the LJBF zone. Too little attraction and a lot of comfort...

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I'm not trying to be a dick Ezo, but you're being a Pick Up Snob in my opinion.

bbardot: you just reminded me about porn

Yes but i dont spent much time with her, since we only see 2 or 3 times a years but yeah she is friend.

ohhh, you might be in friend land. You must now decide to make a move or not.

Even if you make a move it doesn't mean you will loose the friendship.
Make your move, let her know your sexually interested.

picture this, your laughing and she hits you playfully, you hit her back and kind of grab onto her in close, your standing face to face talking. You slow your speech down, grab her hand slowly, your Andrewsmooth... Stare into her eyes and ask her if she wants to kiss you, if she says yes go for it, if she says maybe go for it, if she says no then tell her that you never said that she could and laugh it off.

Up to you bro, make the move or stay in friend land.

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I'm by no means a reliable source of information... yet