Answer:
Dear [Friend's Name],
I hope this letter finds you in good health and high spirits. Firstly, let me start by saying how excited I was when you invited me to your upcoming birthday party. Your birthdays have always been a blast, filled with joy, laughter, and memorable moments. Unfortunately, I have some unfortunate news to share with you. I won't be able to attend your birthday party this year, and I wanted to explain the reasons behind my absence.
The first reason is that I have recently fallen ill with a bad case of the flu. It caught me completely off guard, and despite my best efforts to recover quickly, the doctor has advised me to take some rest and avoid social gatherings for a few days. I don't want to risk spreading the germs to others, especially on such a special occasion like your birthday. I'm truly disappointed that I won't be able to celebrate with you and our friends.
The second reason is that I have a work commitment that coincides with the date of your party. As you know, my job can be demanding at times, and this happens to be one of those instances. A project I've been working on has an approaching deadline, and my presence is required to ensure its timely completion. I tried negotiating for some time off, but unfortunately, it wasn't possible due to the importance of the project.
I genuinely regret not being able to be there with you to celebrate your birthday. I know it will be a fantastic event filled with happiness, laughter, and cherished memories. Please know that I'll be thinking of you on your special day and sending my best wishes from afar. I promise to make it up to you once I've fully recovered from this illness and when work becomes less demanding.
I hope you have a remarkable birthday surrounded by loved ones, laughter, and delightful surprises. Please convey my warm regards to everyone attending the party, and do share some pictures or stories with me afterward so that I can at least be a part of it vicariously. I'm looking forward to catching up with you soon and making plans for a get-together once things settle down.
Wishing you a fantastic birthday, my friend! Enjoy your special day to the fullest.
With heartfelt regrets and warm regards,
[Your Name]
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