My former class teacher sent me a message wishing me a happy birthday. How should I reply to him?

Wow, your life is so good. I can't believe my former teacher sent you a text message. How can we students get such kindness from teachers now? . . Before it's too late, I'll answer the question: Teacher, I'm very moved and happy to see your message. I didn't expect you to remember my birthday. Thank you for asking. Are you okay? How is your health? Don't be too tired at work. Pay attention to rest. Teacher, next time you have a birthday, I will give you a surprise. Really, thank you for coming into my life. It's good to have you! I miss you, teacher!