Just invite him over to your place for coffee or watching a movie. Tell him you were just bored/lonely and wouldn’t mind some company. You just have to be acquainted with a guy to do this. Guys usually dont make a fuss out of this.
If he doesn’t agree try this on 10 other guys in your proximity/workplace/colleagues/classmates/friends. 5 will agree. If youre relatively attractive, make that 8.