Dear [Name],
I hope this letter finds you well. I wanted to take the opportunity to express how I feel about you. I know that we've known each other for a while now, but it wasn't until recently that I started to see you in a different light.
You've always been kind, funny, and intelligent. But it's more than that. Whenever we're together, I feel a warmth and a connection that I can't describe. I've realized that my feelings for you have grown into something more than just friendship.
I understand that this might come as a surprise to you, and I don't want to put any pressure on you. But I had to tell you how I feel. I would regret it if I didn't.
If you feel the same way about me, I would love to explore a relationship with you. But if you don't, I understand and I value our friendship too much to let this get in the way.
Thank you for taking the time to read this letter. I hope we can talk more about this in person.
Sincerely,
[Your Name]