Theres this guy I'm really into and he lives in my building and he's gay (sis was on the apps ) but like we have no common friends and I don't even think he knows who I am honestly but his bedroom window faces mine so it's kinda like the YBWM music video never caught him looking into my window though. i just don't know how to approach him i'm such a scaredy cat
What methods do ya'll use to let a guy know you're interested?

With cash in hand.

Does your apartment building have shared laundromat? If so bump into him there... or let him catch you staring at him through the window idk

Piss around his doorway to leave the appropriate pheromones. He'll pick up on the scent and follow it to you if interested

Just talk to him. It's not hard. You'll either hit it off or you'll fizzle out.

Either way life moves on. You won't get into heaven if he says yes and you won't die if he says no

Follow these instructions carefully: http://www.wikihow.com/Pick-Up-Gay-Men

I wink and smile till they come up to me.. Easy done

crazy dance in your bedroom and make sure that he saw it through the window, like the You belong with me video you mentioned

Most guys know you are interested just by the way you look at them.

Stare at him and if he smiles back with a sexy smile, he's interested.