I trust no one, everyone i have learned will either tell your secrets or use them to blackmail you, and you will walk around waiting for it to come back and bite you in the azz.
I trust my cats and dog, i tell them everything, for 2 major reasons.
1) they will listen attentively, and not interupt
2) they will NEVER tell ,nor will they EVER try to use it against you, and they will take it to their grave.
I have found that talking to my animals, it gets whatever is bugging me off of my chest, and it is a great strees releiver.
just my 2 cents worth.