Why does she keep touching me?

Every time this girl sees me, she waves and smiles at me immediately. She touches me every chance she gets, I swear. I mean, my hands, arms, face, hair!! She even touched my ear once, freaky! I try moving my hand back but she won't let go. As soon as I move my hand, she put her hand back on mine. It's so annoying!!! What's her problem?
Why does she keep touching me?
Post Opinion