I'm in my first term at uni and in my block there's us girls on the top floor, then guys on the second and first floors. We get on really well mostly. However, one of the guys is always a bit weird with me. He's really nice to everyone else, but with me he constantly takes the piss and insults me! He does it in a kind of jokey way but it really bugs me. He always messes up my hair as well. The other night, he thought I'd nicked his keys and started searching all over me for it, and someone said, "Haha, you're giving her a body search!" He shuddered and replied, "Erghh, I wouldn't want to body search HER..." Wtf? It seems that everytime I speak he fires back with some kind of sarcastic comment!
Also, he often comes up to our floor to knock on our doors. My door is the first one you come to on the floor, but he always walks right past it to the other end of the corridor to knock on someone else's door. I don't understand why he does this, I haven't done anything to him.
I even spoke to him about it and he just ruffled my hair and laughed it off. I don't understand why he singles me out like this and I'm quite upset. What should I do?