Flirt with him. How would you flirt or act around a guy who wasn’t a friend? It’s time to up your flirting game and use your best moves on him. Let’s be frank, some guys are pretty dense and need to be whacked over the head with the sign before they see it. Laugh at his jokes and show him that you two have a special connection. Also sometimes they may think you aren’t interested in them and that is why they see or treat you as a “bro.” If you show him otherwise he may start seeing you in a different light.