Castle, Season 7

Beckett:
The moment that I met you, my life became extraordinary. You taught me to be my best self, to look forward to tomorrow's adventures, and when I was vulnerable you were strong. I love you, Richard Castle, and I want to live my life in the warmth of your smile and the strength of your embrace. I promise you I will love you. I will be your friend and your partner in crime and in life. Always.

Castle:
The moment we met, my life became extraordinary. You taught me more about myself than I knew there was to learn. You are the joy in my heart. You are the last person I want to see every night before I close my eyes. I love you, Katherine Beckett, and the mystery of you is the one I want to spend the rest of my life exploring. I promise to love you, to be your friend and your partner in crime and life till death do us part, and for the time of our lives.