Dear [Name]:

I am writing this letter to express my sincere gratitude for the wonderful birthday wishes and gifts that you sent me on my special day. Your thoughtful gestures have made my birthday incredibly special and memorable.
It warms my heart to know that I am surrounded by such amazing friends and family who care enough to take the time out of their busy schedules to make me feel loved and appreciated. Your kind words, warm wishes, and heartfelt messages have touched my soul and made my birthday all the more delightful.
I must say that I was truly surprised and overwhelmed by the gift that you sent me. I cannot express how much I appreciate your generosity and thoughtfulness. The gift is not just a material object to me but a symbol of our friendship and the memories that we have shared together.
On my birthday, I felt truly blessed to have you in my life. Your presence has only enriched it, and I hope that our friendship will continue to grow and thrive in the years to come. All of the love and support that you have shown me is something that I will never forget.
Once again, thank you for making my birthday so special. You have given me memories that I will cherish for years to come. I am grateful for your friendship, your kindness, and your presence in my life. I feel truly blessed to know you.
Thank you again and know that your kindness means the world to me.
With gratitude
[Your Name]