Early stage:
"I didn't lie to you, believe me! Just believe it once, okay?"
"You! Are you worthy?"
"You'll regret it!"
"I will never regret it!"
"Okay, great! I really misjudged you at first!"
Later:
"I regret it... Can you come back..."
"This immortal, have you and I known each other before?"
Intention: If you miss it, you may not be able to come back.