I was walking down the street and there was this cute guy walking out of Barns and Nobles. At first he looked kind of bitter and slightly angry, but than noticed me walking by him and looked at me and subtly smiled. My friend told me that guys usually don't smile at things unless it makes him happy or something... My other friend told me that he looked kind of gay (skinny jeans, sporting the hipster vibe) and he might of just smiled because he liked my outfit.
What does this mean? If the next time a guy does this to me, is it a way of showing I could approach him?What does it mean when a guy subtly smiles at you?
He is probably interested in you.