I just want to start a new life somewhere else away from my family. I want to appear dead to them so I can live my own life without feeling trapped all the time. How do I do this?

You cannot fake your death or make them think you are dead; it is illegal. However, you can "go missing": unless you have a legal obligation to someone (financial contract, legal custody, etc.), you are under no legal obligation to say goodbye or tell where you are going. If they file a missing persons report, if you are contacted by the police or find out the police are looking for you, you must report in and tell the police you are fine -- then the cops will close your file. They cannot tell the complainant where they found you. You do not have to go to your old police station, where the complaint was filed: you can go to any police station or report in through a lawyer.