Dear _____,
Thank you for adopting me over the summer. I really appreciate that. Even though at first I didn't really communicate with you because I didn't know a lot of English I knew that my summer with you will be great from the start. over this summer I learnt a lot of things from you, not only how to speak but also how to be as a person. You were my family and I love and miss you. Hope I'll see you again.