"Don't let people unawareness of you, impact your awarness of yourself"
_ Attributed to Omar bin Abdulaziz
Many people around you will play mind games and will practice what is call under psychology: Character assassination
If you surrender and listen to them they might successfully ruin your life and they will enjoy watching you while collapsing.
keep this quote somewhere visible to you, in your car for e.g. or at your office.
Stay strong don't allow anyone make you doubt about yourself.