These words are often confused.
A confidant is a trusty companion, or intimate friend. You can confide your personal thoughts and feelings to your confidant. The feminine gender of this word is confidante.
- You are my closest confidante.
- If he is your confidant why don’t you confide your feelings to him?
Confident means convinced, certain, sure, assured etc.
- We are confident that we will win.
- A champion racer must be very confident.