Search Results: get back the boyfriend who dumped me

I have this ex, who always calls me when she needs me. She has tried to sabotage a potential relationship once, and has dumped me twice for other guys (the second time was my own damn fault I should've see it coming).

Finally she dumped me for good, or so I thought, a few months later she apologized and asked me to take her back, but I told her I was in a relationship with someone else (it was a lie but I know if I went back to her she would just hurt me again). She said that we could just be friends, then turned around and asked me a favor. This relationship continued till we had a talk about that I was over her and she actually gave me a sincere apology about how she hurt me and everything she did.

Well she just text me asking if she could stay with me. Its the first thing she said to me in months. I mean its like wtf! I ignored her till she called me I didn't answer, but she left me a message, then she called my friend asking if they knew how to contact me, he told her to come by my house tomorrow. I yelled at him for telling her that, but he didn't know about our previous relationship.

She can't live at home because she went against her parents wishes and got engaged to a 37 year old man (she is 18). And got kicked out of her boyfriend's house for being engaged to this 37 year old guy. She can't live with him because he is married. And has forsaken all her friends for telling her being with this guy is a bad idea.

I just don't know how to deal with this, or where my ex gets off thinking she can use me.