Answer and Explanation:
This is an example of how to write the email. Feel free to change or adapt it:
Dear ...,
How have you been? I hope you and your family are doing well!
Whenever you have some time, please write to me. I'd love to know the details of your holiday. You went abroad, didn't you? It must have been so much fun! I would love to see the photos you have taken - and I know you have probably taken lots, since you're a great photographer!
I imagine you have been busy since you came back. But, besides work, what else have you been up to? Did you finally start attending those yoga classes you wanted to?
Oh, I forgot to tell you that I finally got that promotion! I couldn't be happier! Not only is the salary much better, but I also get to work with an amazing team now. All that effort and working overtime finally paid off!
I would like to invite you to come visit us. I will have two weeks off starting next Monday. If you could take some time off as well, it would be great. In case you cannot, maybe you could come and spend the weekend here. How does that sound? We could watch a play and visit that museum you're always talking about.
I hope to hear from you soon! I'm really looking forward to your reply!
Best regards,
...
