I am sorry, I never meant to put you in trouble.
I'm sorry, I was so mad that you just did not show up.
I'm sorry that I sent you that message, not aware that she might read it.
I'm sorry that I could not say anything when she called - I was afraid that I would make things even worse.
I'm so sorry, it just that I miss you so much that I could not help and keep on calling you although I know you might not want to ever deal with me anymore
I'm so so sorry, I miss you so much that I don't know what I am thinking..
I don't know what to do, I just miss you.....