Confident and confidant

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.