The reason.

To you, the fact that I was hiding something is more important to you than how i became like this and why?

----------------------------------------

"Why do you want to break up with me? Tell me the reason"
"There's nothing wrong with you. I'm just not sure of myself."
"I don't need that. Tell me the real reason. If we're going to break up, let's be honest here."
"I don't want you to get hurt"
"You're just acting like a good man.
You need to tell me if you don't love me anymore or if you have someone else so that i can move on.
We started this together. Why do you end this on your own? All right. Let's break up. You wanted me to say this, right? You coward."

When you're breaking up with someone you once loved, you should meet her and talk to her.
That's the least you can do when you break up.