Using 'confidant' implies a deep level of trust and intimacy between people. After years of friendship, I consider her not just a friend, but a confidant.
Pro Tip 2/3
Selected Few
'Confidant' suggests a person has only a few they can truly confide in. Though I have many acquaintances, I have only one confidant.
Pro Tip 3/3
Emotional Support
A confidant often provides emotional support during tough times. In my darkest moments, I turned to my confidant for support.