The improved text should read as followed:
I hope you are doing well. I am writing this letter to thank you, though it is long overdue. There are so many things I want to thank you for, and I am sure I am going to miss some of them. Here is a small token of my gratitude for being there for me.
I cannot tell you how much I appreciate the kindness you expressed by letting me stay in your home when I had no place to stay; you made all my ordinary moments extraordinary. Thank you for trusting me and giving me your time. You simply made everything better.
I would really like for you to come on vacation to England, and I will take you on a tour. I probably will not be able to do as much for you as you did for me, but I will try my best.
Friendship is just a simple word, but you give meaning to it. I cannot thank you enough for what you’ve done for me, but I would like to that say you are truly great.
Hope this helped! (:
