Been a little sad

"I can't wait to see him. It's been way too long. How is he, by the way?"

"Well, he's been a little sad."

"Why's that?"

"A girl he's having a crush on has started dating this guy."

Hi, all. Is this very natural? I can see that 'he's been a little sad' only has 6 hits on Google, which I found odd, so I would just check with you.