Similar sentences often appeared in novels, usually indicating that the protagonist's promise or protection to another person expressed a deep feeling. Here are some examples: I will exchange my three lives of fireworks for your one life of confusion. Please advise me for the rest of my life. I'm willing to accompany you through every journey and witness every moment of your life. Time flies, but our love is as precious as when we first met. I'll keep your face and accompany you until the end of time. I will protect you forever with my life. I will be by your side until the end of my life. Meeting you is the fortune of my life. I will always be by your side, forever. I hope these examples will give you some inspiration to write touching sentences to express your feelings.