Thanks a lot guys about the helpful advices.
About a couple of months ago, I was asking how to get a boyfriend.
Now, there is this guy at work, totally cool and handsome hunk :P

Hmmm, at first, when I met him, he introduced himself to me, boast a little bit about himself and I strangely, I found that quite funny since no one has ever come forward and introduce himself to me. Ok, that was totally normal.
Then, we had to decorate the office for a special occasion, so I volunteered as I love doing these creative things. He helped enormously, well, actually he did the most difficult part. He accompanied me to buy decorations, hang all the decorations everywhere I asked and also even if very tired, crafted some art work.
That was about 2 months ago. I talk to him like I will talk to everyone else. I am not too used to that sort of behaviour so I cannot say for sure if he is interested. Some symptoms or clues could be :
1. He looks over to me while I am talking to someone.
2. His body language makes me feel aware, he likes to be very close to me when we are walking side by side; sometimes he brushes against me while we are walking since he is very close. I do not know but I do not feel like puling away. If he needs to tell me something, he will come very near. Sometimes he will put his hand on my shoulders if he is talking to me. Oh god, only writing about this makes me crazy! Well, there are a few others anecdotes I am not remembering right now.
3. I can sense a feeling of jealousy. For instance, everyday there is another guy (just a colleague) who will accompany me to move my car since the parking lot is so far. He also puts his car in the same parking slot but since I am used to go to move my car with the colleague, I find that normal everyday. Yesterday, I know he saw going with him and in the evening he made this remark which made me think a lot and just affected me through the whole night. Obviously, it was a very mean comment. Therefore, maybe he is jealous and just wants me to go insane. At night at about 1 o'clock since his reactions were still bothering me, I sent him a Facebook message; a silly one, asking him for his help for x mas decorations. He said he does not promise me anything and I replied I am positive and we will speak soon. **Sigh** He is surely successful in whatever he is trying to achieve (My attention)
4. One time I was really down and stressed out, he reached out to me and tried to cheer me up. I felt he was very caring and wanted to help. Actually he is really morally supportive.

However, since some days I am finding myself confused and going insane from his reactions.
Sometimes he is very nice and sweet and lately he has been a lot mean and somewhat rude in his talks. I think I know why, since he saw me giving the other colleagues more attention and maybe not the same to him. Or he does not want the same but more. But how could I possibly be sure since he is not saying anything and I do not know much about him.
That might be his usual thing, maybe he is like this with all the women around him. Anyway, I try to notice him at times, he is very friendly around everybody else, only me, well he is friendly but now more on the mean side. This part really affects me. When alone with him, he is the sweetest person but with hi friends around, he will sometimes tease me but more complain about how I am (i think he might be referring I will look out to him only when I need him)
One time he said, i did not compensate enough for all the hard work, obviously I found that funny at that time but I asked him what do you want. This time there were a lot of colleagues around, so they made fun but he replied: "Now we are talking"...I kind of blushed at that time and did not know what to reply.

All that said, on my side, I think I attracted to him but not sure whether this feeling is genuine or because he is making me crazy that is why I am feeling like this. No one has ever made me felt so.

Now how do I handle the situation and how could I get his attention or give him more attention without being perceived as a freak.
Moreover, I am to shy :(

Thanks.