How Can I Make The First Move?? HELP!!!!!?

I need help making myself show that I'm interested in this guy. This guy is still in the closet, but I'm pretty sure he is gay, I'm also in the closet, so if we do something it has to be discrete. I know he likes me because he always look at me and is always trying to be near me. I also like him a lot. So, what can I do that is not too obvious, but that he'll see that I'm into him, but that wouldn't blow my cover, like to become friends and later on we'll see.