Do I need to replace cracked iPhone 6 screen?

So my friend cracked my iPhone screen and I don't want to make her pay to replace it. It isn't a bad crack, everything works fine. There are 2 bad cracks and then some scratches. Does it need to be replaced or will it spread and break if it is replaced

Yesa

It won't survive another drop, not even a small one. Get the screen replaced at a local phone shop. It'll cost about $75-$125.

NO NEED AS LONG AS IT IS FULLY FUNCTIONAL.

Atleats have her give you some money to pay for it since it was her fault