@HiddenDiamond: Yes, I'm really trying my best to be a good friend to him. I just hope I will know how not to overdo being a friend. I am still trying to get hold what he likes and does not like.
@Everyone: I wonder though if it's normal in a Virgo guy; he teases me and plays jokes at me when our co-workers are around, but when it's just the two of us, he would just be quiet, and somewhat uneasy (he keeps looking at his wristwatch; making me feel he isn't comfortable around me even though I'm at ease with him). He talks but he suddenly becomes reserved.
When I would start the conversation, he will just say what he thinks and then just smiles. I also think he cannot stand me having an eye to eye contact with him; he pulls away his glance whenever I am talking.