I think the text is OK...email would be a little better, perhaps, esp. if she has a phone with email capabilities. Email seems like a good compromise between texting and a letter... You could even get that apology in somewhere in this email that we were discussing. Such as, I know I wasn't perfect and I am sorry for the issues that I did not address previously in our marriage. However, I can honestly say that I have never been unfaithful or gone outside our marriage or intentionally hurt you. That kind of thing.