My question to you is why?

Why did you hurt me, when I was the one who took you in?
Why did you hurt me, I thought I was your best friend
Why did you hurt me, after all the things we’ve been through
Why did you hurt me, when I was so much in love with you?
Why did you hurt me, I gave up everything I had?
Why did you hurt me, now I’m always sad?
My question to you is why?