I believe we were meant to be from the beginning. Forget the intercepted letters, forget the "could-it-be-hers?" anonymous messages that only cause noise. Let's live our truth: we're in love, and have been for a while.
There is no one else I picture myself with and let this letter serve as a reminder and confirmation that I do love you and care about you, and I will spend the rest of my life loving you. You're someone I love and admire, despite our turbulent past, and I'm sure you're going to make a great boyfriend - there are no doubts in my mind of your love and dedication and the qualities of the person you are, and I'm very lucky to have you if you also accept this commitment with me.