1) does he smile when you walk by and his gaze follow after you have long since past him in the hall way but never says hi or any talking is never involved ?
if it is yes then dont get excited and if it is no then dont get excited either
2) if you have to do "partner" work with this guy and he never talks and you dont cause you dont know if he would answer you so you do all the work or vice versa ?
well if yes dont do anything and if no then still dont do anything .
3) do you see this guy at parties talking to other "girls " but always keeping a kind silent and sharp eye on you when he is talking to her and even when she is talking to him ?
if yes don say anything yet if no then dont say or do anything yet .... okay heres the DL ( down low )
Either he is waiting for you to make the 1st move or is waiting to make his ... or he likes you and not for your personality .... explaining why there is no pre- suduction convo going on .........or he is really bold in front of the right person and is afaird to be rejected by you ...so he doesnt say anything iether way in all three insances the guys got hots for you wiether hes after toy get you qucik in the sack or if he just wants to have you lime him but not get rejected .. so hold your horses he likes you and you just need to wait for him to make the right desision or and choice .....
Answer
Make it easy for him to approach you by sometimes not hanging out in a group. Catch his eye from across the room. If he doesn't make a move through several meetings, then move on. You don't float his boat.