How to say that I'm sad?

hi I love to read your informative mails.
I have a question
What is the other way to say that I am sad.
like to say I am happy we can say I am delighted

You could say that you are “upset”.

Andrew Lawton

Synonyms for sad include:
sorrowful, mournful, gloomy, woeful, sorry, doleful, rueful, lamentable, grievous, dismal, melancholy, unhappy, depressed.