Translation of unersättlich

I will be visiting in Italy from April 10 to 15 in order to meet some old friends. I'd like you to attend a one-day course, maybe I can help you in learning something new. Please give it a try.
The easiest way of writing sentences in Spanish and English is to communicate with other people by email or by chat. I found the different time forms quite in Spanish very confusing at the beginning and it was the most difficult part.
I am married and have two children. My daughter is studying geology at the University of Boston. My son is still young. In my next e-mail I will tell you more about me and about them.