Who said "And I'm going to make it with you."?

This quote is attributed to George McFly.

And I'm going to make it with you. - George McFly

"And I'm going to make it with you."

George McFly

"I'm your density. I mean, your destiny."

"This is heavy."

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

"I'm not very good at science."