Dear ...
I would like to congratulate you on the Women's Day and wish you all the very best!
Also I want to say how special you are in my life!
Learning foreign languages nowadays is of great importance. You are the very person who helps me to learn, study, and master English.
On the one hand, you are very kind, sociable, and easy to deal with. But on the other hand, you are very strict, demanding, and motivated.
It's rather difficult to learn English, but it's extremely easy to do it thanks to you. Your good command of English makes it easy for me to overcome grammar and lexics difficulties. Your English classes help me to understand the culture, customs, and traditions of the other country better.
Thank you very much for your proficiency and good attitude towards your pupils.
Take care of yourself.
With best wishes,
(Your name)