writing a letter to my ex

Well, last night at work I started working on a letter to my ex. Not to send, since she doesnt read well, but as a way to collect my thoughts. I've been getting a little nudge from my conscience about coming clean, and I think it might be time. Only problem is, I have NO idea what I can say to her that she would be able to hear. If I do this wrong, I could wreck my relationship with not only her but my daughter as well. Pray for me, if you would.