OK, so I have this huge crush on a guy, and there was this dance. He didnt ask anyone, and then the 1st slow song, he asks me to dance. I am sooo bad at slow-dancing, so I said no playfully. So then he goes over to one of my friends and asks her. She dances with him, and now they're dating, but he always stares at me. His gf is my friend, and it's sorta obvious he likes me, but his gf does too, so I don't want to tell him, cuz then he'd break up w/ his gf. But it kills me to see them together. But his gf would be heartbroken, and it'd kill her if the guy and I dated. What do I do?