Op sounds like he is in highschool, and is trying to force a relationship with the school slut.
Yea, you herd me, we all had one back in the day, tried to turn a ho into a housewife,
She keeps friends she's fucked before because she is craves attention she never got anywhere else,
All she knows is to get attention through sex.
Im willing to be moneys she is also an animal lover and has lots of pets,
This is because she has a fucked up complex and she needs to feel like some sort of god to an inferior creature, she needs them to rely on her and and give her attention.
My ex was like this, she horded dogs because dogs will worship their masters.
Its a fucked up self esteem thing Op.
This girl you are talking about will never respect you because she doesnt even grasp the concept.
She understands attention.
If she thought for even one second that a guy that she fucked has forgotten about her or " moved " she will have a psychotic break.
My ex is this same person, she has a list of ex-boyfriends( including me ) that she flirts with, sends snapchats to and picks fights with,
She was more in love with the attention than ever having a relationship, so she strung us all along based on her looks.
Its a warped and desperate need for worship and adoration.
Get out while you can kid.