Jack sighed, and looked between Astrid and Hiccup, biting his lip as he felt a sudden sadness and dread fall over him. Astrid could sense that it was her time to leave, and gave Hiccup a punch on the shoulder for keeping secrets, before leaving.
Jack turned to Hiccup,…
Jack bit his lip, tears in his eyes as he looked to the ground. He figured ripping it off like a back dais would be the best way, but it still hurt even Jack to say it outloud. “Because I am immortal, meaning I won’t age or die…” He finally looked up at Hiccup. “You will grow old, and I will stay young… You will die, and I will live forever…” He winced at his own words.
"With Astrid… You can have a life, die with her, have children with her… You will have a normal life without heartbreak- if I’m Jack Frost… I have to go at night to leave snow…" He sighed deeply, looking to the ground, ashamed.