Lock the door, and step away

Have you ever feel that you made a wrong decision in your life that you just want to escape from it? Have ever experience, choosing a person that you know in your self he might hurt you, But don't want to give up? Like there's a door dividing your world to his world, and every time he do something you wanted to close it because you wanted to protect yourself of getting hurt?but, back in your mind you're thinking what is he doing in the other side of the door.