Вячеслав, с днем рождения! Happy birthday! Be healthy and happy in your work! You're my friend, your course is excellent! We're moving forward together!
I am happy to learn English with you. You are a wonderful teacher!
Thank you! You are such an interesting person!
You are beautiful, attractive, friendly. Keep it up! I want you to have many friends!
I want you to be happy! Yippee! Have a great day! See you.