it just takes time to be able to separate the feeling of "i really don't want to lose this hand" from the feeling of "i think i have this hand won". i think early on you will try to convince yourself you have a hand won just because you really wish you did, you're mad your hand just got counterfitted when the turn came, etc, and will do your best to ignore your better common sense and convince yourself this hand is yours, when deep down you know its not a read of a bluff but just you being mad about not having the best hand.