^^^ Well, that may be true but it does not indicate HOW he likes her: Friend or otherwise. I suggest that next time he teases you, you tease him back and make it known that you "like" him too. Hopefully he has some ballzzz and will eventually ask you out. Or you could do the modern thing and suggest the two of you have a drink or something after work. Do you even know if he's single?
“The willingness to accept responsibility for one’s own life is the source from which self-respect springs.” ~Joan Didion