Congratulations!
  A little birdie told me that you finally found someone after years of thinking of what we could've been in this present time. I told you that you can do it, and you did it. You've finally moved on. I couldn't be any happier that you are now happy in the arms of another and finally starting a new journey in life. Make sure to get this one right okay? You should do the things that you lacked in our past relationship. You check up on her, constantly remind her she's important, shower her with attention that she needs, set the both of you as top priorities and never leave her in her time of need. Never let her feel that she is nothing compared to the other females in the world, especially to me. Because I know she's a lovely human being and I'm glad you are with her.

To my former lover's new lover,
  You've got someone who's a real keeper but we didn't last because we were lost, young and naive. I hope he'll shower you with constant love and affection and that you will do the same for him as well. I am glad we did not end up being together because he was meant for you as I am meant for my current lover. Now don't you compare me to you or you to me. We are different people and we are unique. I will not interfere for this is an innocent letter for both of you. Smile honey, he loves you not me.

Back to my former lover,
  You do well and be well. As I am in a journey with my current lover, I hope you'll enjoy your journey with her and never stop loving her. Thank you for what we had before. If it wasn't for us breaking up, we would've never met someone better. So in the end I do not regret the "us" that we had, I hope you feel the same way too.

                                           Sincerely,
                                             your former lover.