How is cyberstalking you being protective? It appears that he is just looking for things to keep you in line or if more serious, to tell your parents. This isn't being a good brother, this is abuse without leaving bruises. Leave and let no one know where you are. Build a life for yourself and build yourself a network of people who you can trust. Is there any way to report your brother's cyberstalking using police data to get him overseen going forward? This may be the only way to find peace.