Dear [their name],
I have been keeping this bottled up inside for far too long and I cannot keep it to myself any longer. The truth is, I have been harboring feelings for you that can only be described as a deep, all-consuming love. I know we may only be acquaintances or friends at this moment, but I hope that this confession can be a turning point for us.
Every time I see you, my heart races and my breath catches in my throat. I cannot help but feel a rush of excitement every time we are in the same room. I admire so many things about you: your intelligence, your kindness, your sense of humor, and your inner and outer beauty.
I will admit that I am nervous about how you may receive this confession. Perhaps our friendship will be irreparably changed, or maybe you will reciprocate my feelings. Either way, I feel it is important to express my emotions and let you know how I truly feel.
If you feel the same about me, I would be overjoyed to take this relationship to the next level. If, however, you do not share my romantic feelings, I understand and will respect your decision. Regardless, I hope that we can continue to have a positive, respectful relationship, because your presence in my life is incredibly important to me.
Thank you for taking the time to read this letter. I hope that it will not change the positive dynamic between us, and I look forward to your response.
Sincerely,
[Your Name]