Dear Welcome to HCM We understand your concerns I went through your details. I suggest you not to worry much. The condition your friend is facing in most probability is Obsessive Compulsive Disorder limited to obsessive incessant talking. You need to understand about her total behavior pattern to know whether she has some other obsessive compulsive disorder symptoms. Psychological or psychotherapeutical intervention may be needed initially. As time passes, with the therapy and medicine, she should be alright. Do consult a psychologist soon. If you require more of my help in this aspect, Please post a direct question to me in this website. Make sure that you include every minute details possible. I shall prescribe some psychotherapy techniques which should help you cure your condition further. Hope this answers your query. Available for further clarifications. Good luck.