Dear Karen,
It has been some time since we were last in touch but it has been time well spent!
I think that you might have been aware that Jane Clarke and I have been seeing each other since October last year.
The good news is that we are still seeing each other, but the even better news is that we got engaged in October this year and will be getting married in July next year.
We would both like to thank you sincerely for introducing us to each other and for the valuable advice you gave us individually.
I wish you continuing success with your business.
With kind regards,
Names have been changed to respect their privacy