Hi there,
Actions speak louder than words. Are there other actions that this man does to indicate further that he likes you? Does he go out of his way in other instances to be around you or be considerate of you? If not, it may be that the two of you are simply engaged in a little enjoyable flirtation. Give it more time to discover if this is passing fancy on both your parts or if you really like each other. After all, there's no rush considering you see each other every day.
Also, I wrote a post on the pros and cons of Workplace Romance that you might find helpful before taking any actions. The link is below.
http://datingmadeeasyforwomen.com/?p=9
I hope you find this helpful,
Lanay
www.DatingMadeEasyForWomen.com