Are you a loyal person?
Does your loyalty go beyond a face to face relationship?
Be loyal in what you say about people who are not present. In doing so, you will build the trust of those who are present. ~ Nicky Gumbel
Trust is not something that person give out after knowing someone for a short period of time. it’s something you must earn, normally over a long period of time.
Remember though, just because someone who trusts you isn’t present, don’t mean they won’t find out what you’ve said, so, as the above Nicky Gumbel quote says, make sure you stay loyal to those who aren’t present.