How do i overcome a horrible fear of heights mostly of rollercoasters ?
your phobia is definitely justified. The only way to overcome it is through psychotherapy. There are certain techniques that gradually and safely face you with the object of your fear. It is not something you can do yourself and it is not something that can be achieved through self-help books. In the safety of the relationship that develops between you and the psychologist/psychotherapist you are taught ways to approach your fear in a step-by-step program that usually takes about 15-20 sessions. The sooner you deal with this, the sooner you will get rid of the fear.