Girls what would you think of this?

if a guy flirted with you for a long tim e,kept looking at you so much,you made it clear to him you liked him without saying anything.he never approached you.then you hadnt seen him for ages and then he pops up again just staring at you ,what would you do would you saysomething or wait fior him,i dont know what hes felling or if hes just playing around,i know he has a girlfriend,would you ask him whats hes doing