Some songs about unrequited love?

I know this guy (not me, I'm a girl) who is gay and madly in love with
another boy. However, guy#2 claims he is straight.
The weird thing is that guy#2 is VERY friendly with guy#1. Like he is
always cuddling and being close to him.
Anyways, guy#1 keeps whining about it to me, so I'm looking for some
songs relevant to the situation that I can play for him so he can be
sad with accompanying music. Also, guy#2 is NOT dating another girl,
so songs like "You Belong With Me" don't really work.I have some
relevant songs, but would like a little more.
Thank you!