Hello and thank you for your question.
I understand how you are feeling heartbroken and confused about what has happened here. What you need to really understand is that this woman has made several poor judgment calls that have resulted in a fairly chaotic life. Whether this is due to her mother's meddling, her own emotional instability or mental health issues, etc. the fact is that she really is not in a position to be a good partner to anyone at this time. She first needs to get herself together and her life functional, before she could be giving to you (or anyone else).
So, what would be most helpful for you is to look into why you chose this person as a potential partner with all of these red flags waving directly in front of you.
There is a good book I would recommend you read called Codependent No More by Melodie Beattie. You can purchase it an amazon.com. It talks about when someone gets so involved with taking care of someone else (who has lots of problems) that your own needs and wants are completely neglected. You want to be sure that you don't repeat this pattern.
I agree with Dr. Rossi that it's up to you, to ultimately find your peace, and to find a partner who is able to both receive AND give. I would encourage you to heal your broken heart by staying active, exercise, being social and eventually dating others. No contact with this woman is a beneficial thing for you.
Move forward from this and take it as a valuable lesson. I wish you the best. Please click ACCEPT button for this answer, so I'm credited for my time. Thank you,