Invasion of the Body Snatchers (Philip Kaufman, 1978)

I never thought I knew you, until you changed. I realised, the secrets, the mystery and the unpredictability were not keeping us apart, and they were just a part of who we are. Until things began to change, I never saw you for who you were, I never understood how I felt about you. Now I fear it is too late, and there is no longer any hope. I cannot hold on any more, and I watch you slip away. There is nothing left and nothing worse than being alone.