Final answer:
This is a letter of regret to a friend, explaining the reasons why the writer cannot attend their wedding ceremony.
Step-by-step explanation:
Dear [Friend's Name],
I hope this letter finds you well. I wanted to share with you that I won't be able to attend your wedding ceremony, and it truly saddens me. I understand the significance of this event and how important it is for you, but unfortunately, due to [provide reasons for not being able to attend], I won't be able to join you on your special day.
Nevertheless, please know that my absence in no way diminishes how much I care for you and how excited I am for this new chapter in your life. I will be there with you in spirit, celebrating from afar.
Once again, I apologize for not being able to attend and wish you nothing but joy, love, and happiness on your wedding day. Please keep me updated with the details and remember that I am always here for you as a friend.
With deepest regrets,
[Your Name]