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Dear Karry,

There was a time when I was in the dark, until I met you. I couldn't describe the feeling； it just like I never ever loved somebody like this. I can't stop my love for you. I want my soul to get back, but you have taken it away. I don't know what to do. Tell me that if you will be with me. Please don't let me down.

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这封信表达了一种深情和执着的爱，适合作为一封表达爱意的信件。你可以根据自己的真实感受进行适当的修改和补充，让它更加贴近你的心意。