Who said "Marty, you're my best friend and I couldn't bear to lose you."?

This quote is attributed to Doc Brown.

Marty, you're my best friend and I couldn't bear to lose you... - Doc Brown

"Marty, you're my best friend and I couldn't bear to lose you."

Doc Brown Love

"This is heavy."

"There's that word again, 'heavy.' Is there something wrong with the Earth's gravitational pull in the future?"

"Great Scott!"

"If my calculations are correct, when this baby hits eighty-eight miles per hour, you're gonna see some serious shit."

"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!"