This is hard, because she won't let me leave. This sounds dramatic but I feel a lot of pressure to stay. She tells me I had no one to look after me growing up, so someone has to be on my side, so I think this is why she is quite firm with me.

Even thinking of saying I want to leave scares me because I will basically be told no, it's a very bad idea. And I know of course it's my choice, but it's very difficult to leave under these cirumstances.