What is she...................?

Ok first some info I had an horrible child hood bad mom dad that was never there because of work mom rips family apart etc.. When I was little I had no friends I have an strong southern accent moved to city other kids avoided me so to keep from being lonely I made myself an friend but because of the trauma she ( now calling herself hope) turned into something else she is kinda like an person living inside of me she can control my body only when I am asleep or nocked out she knows everything I do but she docent share her memories with me we talk when I'm bored or upset she can take over suddenly this way she has stopped me from committing sew-aside many times my best friend in the world says that she is basically an female me I'm just wanting to know what she is I'm not wanting to get rid of her she keeps me safe and in check what is she she wants to know to.