One of the worst things a person can do to you is break your trust in them. I know because it has happened to me many times by the same person.
You probably think its my own fault for having taken them back into my trust after the first couple of times they betrayed it, but anyone out there who is in an intimate relationship knows that a relationship can't survive long without trust. So, it was try to trust again or watch the relationship fall apart due to nagging doubt. I chose to trust again and the relationship still fell apart, not from doubt, but from the certainty that the person I was with is a borderline sociopath.
Unfortunately, the years of never knowing if my trust was misplaced or not left me with a terrible hangover. It got to be that I started to second guess everything I thought was real. Did I just misplace that item or did someone take it? Is it possible that I forgot to mail that check? Am I sane, or insane? Doubting your own reality is a terrible feeling and one that is sure to leave you vulnerable to people who would like to exploit that weakness. It is what I call crazy making.
I am sure that there are people out there who purposelly drive you into thinking that you can't trust your own perceptions in order to control you. This is a cruel and heartless manipulation that can have lasting damaging effects. Not only does it make it difficult to form new relationships as you are suspicious of everyone for fear of being hurt again, you can't trust yourself to be sure that what you think is right, is right. This leaves you in a constant state of doubt and confusion when it would be preferable to just know that the person you are dealing with is a rat skunk and that your precious , heartfelt secrets or what ever it is that is important to you, is gone forever. That is infinately better than constantly wondering if they will turn up again someday or if so and so doesn't already know that you said they are fat. To not know is to be in a state of limbo where nothing can move forward.
In order to grow and thrive in this world you must be able to trust, not only others but your own truth. To be able to trust and keep trusting is a gift that is not to be underrated, so count yourself lucky if you are one who can still trust freely without fear.