Just if he tries to get closer or asks for an explanation for your behavior.
He's from my university, but on the Geology master's course (reminder: I'm on the Physics doctoral's).
He is very cult, but still cute and so shy! Yet we managed to talk well, then we enjoyed the play at the theater, and more talk, and he looked interested and even excited while I talked about some usually boring stuff. He's even considering come back playing games after so many years, and maybe via Pokémon Go!
When we were about to say goodbye in the subway station, I got some initiative and kissed him. ^-^
But he's so shy he got me a bit shy too! xD