write an email with the following information. Thank you so much for your incredible support and guidance. Your wisdom and encouragement are invaluable to me and I have grown both professionally and personally under your mentorship.
Thanks again for sharing your knowledge and helping me to become better. You are truly a super women and a super mentor who is always there to listen me and providing me push in the right direction.

All time I am soo happy and proud  to have you as my counsellor