Friendliness means maintaining respect and gentleness in conversation, meetings, and disagreement. But friendship does not require calling a falsehood true or helping someone violate another person’s rights.
For example, a friend asks you to confirm a lie. The better response is to explain the problem privately and kindly, avoid humiliating the friend, yet decline to take part in deception.
A respectful greeting and willingness to listen despite disagreement are also forms of good conduct. Gentleness and truthfulness are not opposites.