There is a therapy that will allow you to process away the feelings of shock that you are holding from these incidents, and it is called EMDR, Eye Movement Desensitisation and Reprocessing. It is a trauma therapy, designed to allow the memories stored in the subconscious mind as a result of traumatic incidents to be processed away, allowing the memories to fade back in time instead of always feeling 'as if they were yesterday'. The subconscious mind always takes the role of protecting ourself, so its intentions are always good. However, it sometimes takes on board irrational beliefs based on the experiences we have had, so for example, you may be reacting to the lies, the dishonesty and what that means for you in this world.
Have a look on www.emdr.com where you can find more information about this therapy and therapists local to yourself. The therapist will guide you through each stage of the therapy at your own pace, allowing you to let go of what has happened to you and the impact it has had.
I hope this is helpful and wish you well. Not everyone in this world is like this and you can begin to believe this again. Best Wishes, Sarah