Meaning: I empathize with your point of view

With only three words you can make it plain that you are really listening to someone and relate to what they are saying:

• “I’m kinda sad to be back from vacation. I wish I was still on that sandy tropical beach.”
• “I hear ya. After I got back from Acapulco, the view from my apartment depressed me for weeks.”

“Tell me about it,” is the sarcastic alternative, as in “don’t tell me about it because I already know too well!”