Is this what it means to have your heart sink?

I wish it would disappear
If it weren't for you, we wouldn't have gotten engaged or anything.
Your empty expression made my heart flutter
“Wait, I’ll call the professor.”

" no "

“Kim Seok-jin, you do it. If the professor finds out, there will be chaos.”

“You really…”
“Please give me some painkillers
“Please dress the open wound first.”
“Why are you acting like a rascal?”

“It would be better if I suffered. How scared must the innocent nurse have been when she was taken hostage?”
"You are real"
“I’m completely fine, I don’t feel any pain.”

“It’s going to hurt a lot when the painkillers wear off.”
I just admitted it now
That you and I are really engaged
