Guys, if a girl winks at you, do you think she's interested?

I'm interested in a guy I often talk to on the train. I think he's interested in me (smiles, laughs at my jokes, some prolonged eye contact, etc.), but I don't know if he intends to act on that interest or not. Based on what I know about him, he could be waiting for a clear signal from me, so I... Show More