I gave it to him today. It said:

Dear Jimmy,
I know you never wanted to hurt me, but in the end that's what you did. It even got to the point where I started to feel bad about myself because you cheated on me with a girl who used to annoy you (and that didn't make sense to me at all). I hope you find another girl who will make you happy. And even though things ended this way, I will never regret being your girlfriend. No one has ever taken an interest in me the way that you did. I'll see you around. -Hannah