Sure, here are 9 sentences you can use to express gratitude to a friend:
1、"I am truly grateful to have a friend like you in my life."
2、"Your friendship means the world to me, and I appreciate you more than words can express."
3、"Thank you for always being there for me, your support and kindness are invaluable."
4、"I am so thankful for the laughter, the memories, and the unwavering support you provide."
5、"Your friendship is a gift I treasure every day, thank you for being such an amazing friend."
6、"I am grateful for your friendship, your understanding, and your unwavering loyalty."
7、"Thank you for being the kind of friend I can always count on, you are truly one in a million."
8、"Your friendship has brought so much joy and warmth into my life, thank you for being you."
9、"I am blessed to have a friend like you, thank you for being a constant source of positivity and love in my life."