By definition, a confidante was a female, so to answer your questions, sort of and no. In that order. It wasn't a male either. Heck, it wasn't even human! Not even living! What is this strange thing that the broody male had confided all his secrets in?
The sky.
Yes, the sky. Shouting your frustrations into the heavens usually calms you down, so if it knows all that, why shouldn't it know all your secrets too? So, he shared everything with it. Whispered all his secrets to the sky.
Only the sky knew of his little ticklish spot behind his right ear, that the cut he had gotten from his male teammate that day really did hurt, though he was too proud to admit it. It also knew that he had a slight fascination with his other teammate who really wasn't as annoying as he claimed, and that the only reason he didn't groan in pain from the aforementioned cut because he refused to do so in front of her.
Pretty embarrassing right? He would say so. It was a pretty good reason he would whisper things to the sky and not aloud to an actual living thing. The sky couldn't talk back. It couldn't tell him how stupid he had been, or what should've been done. He already knew all those and clearly did not need it weighing down his conscience more than it was already.
He now understood why that lazy guy in the other team loved staring up at the clouds so much - at the sky. It's not like the clouds could tell him to stop staring like people did when you do so to them.
The sun rises and sets, and at night, it was as if those clouds and sun never existed at all, though you knew quite well it'd be there again by the next day. They were replaced by a glowing moon and twinkling stars. If there was one thing that was a constant, it was the sky.
It was dependable. The perfect thing to keep his personal Pandora's box because everything...everything...
...was between the sky and him.