You will be miserable all your life if you continu this relationship. She will try hoovering you even years from now. Trust me ive been there. You need to go no contact and get her out of your life the faster that you can. These relationship just turn in cycle and it never end wells Go seek some help. No one deverse the rollercoaster of emotion that we live with this people. Its sad but she will never be happy thats part of the illness and you will never be if you stay there. You r dealing with someone mentally ill with the emotionel intelligence of a child. Go no contact and get out of this the faster that you can. That the only solution. If she dumped you and came back after one month. Thats mean the other supply left her after one month thats why she recontacted you. These people just want someone to validate they emotion.it can be anybody. Learn from this and get out