Why do she cry

When I see her face it makes me sigh
because I know I made her cry
I say to myself "why do she cry over me"
she said loved me and turned away to another
that was my very own brother from the same mother
so I did what she did I found another
that turn out to be her friend
when I saw her again, I said this must end
so don't cry because I am the one saying bye