How do you use friendliness in a sentence?

It depends on what you are writing, you could say..

'Jesus had a nature of friendliness.'

'She opened her arms of friendliness'

'Not did she only have a heart of gold, she spoke Words of friendliness..'

There are many different ways of using friendliness, you should use a thesaurus and use others Words that relate to friendliness, as it is quite a hard Word to put it sentences.