Who said "Gamora... did you do it?"?

This quote is attributed to Thanos.

Gamora... did you do it? - Thanos

"Gamora... did you do it?"

Thanos Love

"I am inevitable."

"The hardest choices require the strongest wills."

"Perfectly balanced, as all things should be."

"You should have aimed for the head."

"I love my wife, but sometimes she drives me crazy."

"Love conquers all obstacles."

"Love is patient, love is kind."

"I'm not stupid, I'm just in love!"