“Goodbye” is one of the most common and saddest English phrases.
On one hand, it could be temporary, however, it can also be long-term.
I am hoping that our “goodbyes” at your graduation are only temporary, and that we meet again.
I am so proud of you all for your accomplishments!
You have all worked so hard to get to this point, and I am so glad that I was able to be a part of helping teach you.
I know we have only known each other for a short time, but I will miss all of you.
Rather than this being a letter of farewell, I'd like to express my congratulations for your graduation.
I hope you have success in your future, and confidence in yourselves that you can accomplish the things that you put your mind to, and achieve your goals.
You are all very special, hardworking and talented individuals, and I am so honored to have had the opportunity and pleasure of being able to teach you all!
Once again, congratulations, and I hope you have a wonderful year ahead!