I'm new so I'm not sure I'm in the right place...forgive me if I am.
I have been with my girlfriend for 4 years and we were friends and neighbors for 6 before that. Over the course of last year, she seemed to have multiple personilties. She would be her normal kind generous self (flower child if you will) with a bit of OCD, then change to manic depressive, as if nothing in the world could ever bring a smile to her face, all is lost. She would go through this a couple times a day, but then she wouldn't remember it ever happening. When I explain it to her, she would deny ever being the other (if she sad, she won't remember being happy, and when shes happy she doesn't remember being sad.