Hello, “Full Name”,
I hope you are doing good!
Its really awful to write a letter like this but I am really sorry that you got such hints from the side when I didn’t intend to convey any such message of being interested in having any relationship more than being friends. We have known each other for a year but I dont know how come you are still unaware that I am already married to the man of my dreams.
You and I are friends and I want to keep this relationship like this but as I know that you have different feelings for me I would understand if you create distance amongst us as its never easy to be around when you feel something for someone. I respect your feelings but this can never happen between us. I hope you understand.
I pray to god that you get the girl of your dreams and have a very happy and successful life ahead.