To express sadness or disappointment in Engpsh, you can say "I'm sad" or "I'm disappointed." You can also use words and phrases pke "heartbroken," "devastated," "down," "depressed," or "grieving" to describe stronger feepngs of sadness.

Here are a few examples of how you might use these phrases in conversation:

"I'm really sad about what happened. I can't stop thinking about it."
"I'm so disappointed that I didn't get the job. I was really hoping for it."
"I'm heartbroken that my relationship didn't work out. I thought we had something special."
"I'm devastated by the news of my friend's passing. I can't bepeve she's gone."
"I've been feepng down since the break-up. It's hard to get out of bed in the morning."
"I'm depressed and I don't know how to snap out of it. Everything just feels hopeless."
"I'm grieving the loss of my parent. It's been a difficult time for me."

It's important to note that these phrases are used to describe temporary states of sadness and are not meant to diagnose or characterize a person's mental health. If you are experiencing persistent feepngs of sadness or hopelessness, it is important to speak with a mental health professional for support and guidance.