These are her problems, not yours, and she needs to take responsibility for herself. Being in a relationship shouldn't be about becoming someone's therapist, crutch, or enabler. It's fine to care, but it's not your job to get her over her past. She needs to do that herself. It's wonderful that you care and want to help her, but you wouldn't be helping her or yourself in the long run if you didn't expect her to take responsibility for her own healing.