[Your Name, & Address here]
[Recipient Name & address here]
It’s really not easy to have great friends in life. Some people are really fortunate to have understanding & helping friends and I am one of them to have you by my side.
I consider myself lucky to have such a great friend that you truly are. I really want you to know that I always treasure your friendship.
I have never had such an understanding friend in my life. You helped me so many times when no one was with me. You always offered me your helping hand whenever I was in trouble. You were always there for me.
You are a great person, and we will always be friends. You mean a lot to me.
Thanks for everything you did for me over these years. Thanks for being my friend.
Encl: [Enclosures List here]