Help me write a paragraph telling my boyfriend’s mother that “ thank you for everything that you’ve done that may family couldn’t done it for me”

Dear [Boyfriend's Mother],

I want to express my sincere gratitude for everything you have done for me that my own family couldn't have done. From your unwavering love and support to your kindness and generosity, I am truly grateful for all that you do. Your guidance and wisdom have been invaluable to me, and I am so lucky to have you in my life. Thank you for everything, and I hope you know how much you mean to me.

With love,
[Your Name]