Indeed the DSM 5 says if there is intense sorrow and emotional pain for a loved one after 12 months then that is classed as complicated bereavement, a neurotic condition.
My experience with those who are close to a suicidal person finds the feeling and thinking responses to be wide and varied. By no means are they all negative as one might logically expect.
Full contact in relationships is something that many humans seek but at the same time can be frightening. It seems safe to say that the natural human condition is to have quite a strong ambivalence about emotional intimacy in relationship.