Trust has to be earned and is not a given just because of a relationship existing or not existing. I understand your frustration and you should certainly always question things in life but not trusting anyone ever again is a lonely path to walk, say goodbye to any kind of relationship in life, no friends, no family, no babycake. if you do happen to find a rare human that consistently does right by you don't write them off so fast. Sometimes companionship is nice to have but no company is better than bad company as well.