Well, this is a kind of an universal problem because after reaching a certain stage we feel that we are governed by maturity so much so that even our parent's wise words compels us to leave a remark like"Uff.." As far your question is concerned I can understand what you are trying to say. But always remember that it isn't the case that your parents ain't trusting you. In reality they are overly concerned about you. Since in their eyes you are a good child they fear if this morality within you suddenly vanishes if by chance you fall under false friend's group. Look nothing's gonna make you lose your self confidence. Just make sure that you don't do anything behind your parents back. Do not hide from them anything. Discuss everything so that they can make a track of your doings, and remain obedient for ever. Do this things and their fear will slowly diminish and so will the thoughts of you regarding your parents.