What does any of yall think this means

So theres this dude i work with. Handsome chap. We havent ever spoken much. Few words here and there work related just. But he is sooooo arogant and rude. To not only myself but shop customers also. Only, i find him to be so extra rude and cheeky to me. But stares me out at every given oppertunity and when i catch him hes quick to look away. He will walk past me and give me what i take as total dirty looks and i personally feel like the guy f@#king hates me. But with no apparent reason. If i walk into a room. He goes funny and walks out. I tried to confront him personally and ask him as a joke with a jag, why he hates me so much and his respons was awk i hate everyone and walked away. (Said with attitude tho) so after him being THAT rude to me one day where i hit tears, and couldmt pluck up the nerve to say anything to his face i sent him a fb message asking him ever so nicely and heartfelt what id done and what his problem was and he just decided to block me rather than respond. Now when he approaches me in work i get a slight smirk and a hello, but wont stay in the same room as me. What do u guys think this dudes problem is. We dont even personally know eachother from adam