It’s been many years since we spoke, and I still remember back to that terrible time when I did irreversible damage to our friendship. It was wrong of my to sleep with your girlfriend, no matter how hot she was, or how seductive she was. It was still wrong of me, and I’m sorry.
I hear that you forgave her and you stayed together for a while, but I’m uncertain if you are still together now. Either way, I wish you well.