My Memory of Study Abroad in New Zealand

I sent an e-mail to my host mother in New Zealand little while ago.

5 years has passed since I homestayed at her home.

At the time, I was a high school student. I stayed in New Zealand for a month.
During my study abroad, I studied in a high school. I made a lot of friends there. They talked to me a lot, but I couldn't talk to them, because I am shy.
It was also a challenge to talk to my host parents. I think my attitude sometimes annoyed them. However,they were always kind to me. I want to say "I'm sorry about that." and also "Thank you so much." to them in person someday.

Now, I miss them so much. I really want to see them again.
Though my English is still poor, I will talk to them a lot when we meet.