Subject: Sorry for Missing the New Year's Party
Hi [Friend's Name],
I hope you're doing well. I wanted to let you know that, unfortunately, I won't be able to make it to your New Year's Eve party this year. I'm really disappointed, as I was looking forward to celebrating with you.
The main reason is that I have to take care of some family commitments that have unexpectedly come up. My parents have decided to visit, and since it's been a while since we all got together, I feel obliged to spend the holiday with them. Additionally, I've been feeling a bit under the weather lately, and I think it's best if I take it easy and recover fully.
I hope you have a fantastic party, and I'm sure it will be a great success. Let's catch up soon—I’d love to hear all about it.
Wishing you a wonderful New Year!
Best,
[Your Name]