I may happen to know of one. She's my former husband's girlfriend of over 7 years. She's emotionally unstable when it comes to him or the idea of a him...wanting to smother him and push him away at the same time...afraid of being rejected and insisting on being needed. Part of me feels sorry for him...though he created his own trap. She can be loving and extremely frightening at the same time. I don't believe he actually knows if he won't leave her because he loves her, because he fears her, because he pities her, or a combination of emotions.