Dear [Name],
I hope this letter finds you well. I have been holding back my feelings for far too long and I couldn't go on another day without telling you how I feel. I have fallen for you, and I just couldn't imagine life without you.
Every moment that I spend with you is a moment that I cherish more than anything in the world. You light up my life and make every day worth living. Your presence alone brings me joy beyond measure.
I know that this may come as a surprise to you, but I couldn't keep my feelings hidden any longer. I hope that you can find it in your heart to give me a chance to show you how much you mean to me. I promise to always love and cherish you, through thick and thin.
I understand that this may not be the right time, or you may not feel the same way about me, but I just had to tell you how I feel. Regardless of what happens, I will always be here for you as a friend, and nothing will change that.
Thank you for always being a positive force in my life. You are truly an amazing person, and I just hope that I get the chance to show you what you mean to me.
Sincerely,
[Your Name]