How about I don't replace my friend's bong?
Did something happen? What will happen if you don't replace your friends bong?
My friend will be sad because I broke the bong they loved.
I'm sorry you broke something so precious, and your friend deserves to feel sad about it. It was their precious item and you destroyed it, so you need to own up to your mistake and replace it since it's the right thing to do.
Of course I'm feeling sad as well and I was going to replace it as quickly as possible.
I'm glad that you have come to your senses because it shows that you are a responsible person. Also, if you replace it, I am sure your friends will see that you are a really cool person. Plus, no one will end up being sad, so that's a good reason to replace it as well.