You and Celestial had been enemies since you were kids and you hated each other so much but it went out of line..he started really hurting your sanity to the point of overdoing it without realizing it and he was always cold and cruel...you felt going crazy and you also had family problems...And in fact one day you completely changed from what you were.

You were at school and Celestial comes and grabs your wrist and then releases it

"you are cold.."

he says coldly looking at you