To my best friend: I wanted to take a moment to thank you for everything you've done for me. You've been there for me through thick and thin, and I don't know what I would do without you. You're the best friend a person could ask for.

To my mentor: I'm so grateful for your guidance and support. You've helped me to grow so much as a person and professional. I'm so lucky to have you in my life.

To my loved one: I love you more than words can say. You make me so happy, and I can't imagine my life without you. Thank you for being my everything.

You can also add some styling to the text, such as making certain words bold or italicized.

For example, you could make the word "appreciation" in the heading bold and the word "messages" italicized. This would make the heading stand out more and make it easier to read.

I hope this helps!