Dear you,
Today, you told me you found the girl you're going to marry. Today, I realized that any fantasy of you ever loving me back is absurd and childish. Today, my heart clenched, and my stomach churned, and, for a minute, I forgot how to breathe. Today, I realized that we've both changed, and so has our relationship; and we can never go back to what we once were. I am happy for you, I wasn't lying when I said that. I want you to be happy, and she's a lucky girl; I'm happy for you, really. I know that one day, there will no longer be a we, just a you and a me, but even after that, I will always be happy for you. I will always be grateful that you were in my life—even if it was never meant to be for forever.
Love,
me