I have been friends with this guy for almost a year now but about 2 months ago him and his girlfriend broke up (it ended mutual) and things changed between, it feels weird just us two of us hanging out like we did before. People have been asking us if we like each other, we both say no. If you (meaning a guy) think one of your girl friends likes you would you tease your her because you like her reaction (I blush and then glare at him) or does that mean you are interested and your testing the "waters"?
I am in the same boat as you. My advice is to talk to his friends and ask them if he likes you or not. The other thing is "do you like him?" if you do I would try to get closer to him, give him hints that you like him. If he doesn't pick up on them his friends will. I hope this helps you!