Someone's confidant is a man who they are able to discuss their private problems with. a close confidant of the president. someone you tell your secrets to or who you talk to about personal things (confident)
One to whom secrets, especially those relating to affairs of love, are confided or intrusted; a confidential or bosom friend
Someone's confidante is a woman who they are able to discuss their private problems with. You are her closest friend and confidante. a female confidant (confident)