I am, you are

I AM a girl
YOU ARE a boy
I AM brunette
YOU ARE blond

When....
I AM depressed
YOU ARE cheering me up

When....
YOU ARE depressed
I AM cheering you up

If....
YOU ARE happy
I AM happy

If....
YOU ARE in love
I AM heartbroken

If......
I AM in love
YOU ARE ignoring the fact that I love you