when the penny finally drops

so i ask her for a chat,just the look on her face cos she had to leave her pc. her whole persona was like she didn't want to talk to me. so i start by saying i wanted a chat but i didnt want her turning it round on me,but as soon as i started saying about how upsetting it was that she had been invited to go to things by her family but they havent asked me and it would be nice if she said "what about my partner" she bloody started,"can't i go out without you sometimes" and how i slagged her off to my brother which i said no i just told him the truth that she stole some of my money. i told her how her niece had upset me but she hadnt said anything to her.her answer to that "it was just once" then "she prob didnt realise  it was you she was talking you as shes so use to telling her younger sisters. now that excuse was unbelievable her neice a 22 year old telling me over 50 year old to put a kids toy down cos she didnt want it breaking ,she shouted it across a crowded room,how the fuck could she not realise it was me. so now i'm really annoyed that her neice can do nothing wrong but me i'm not allowed to say how that girl made me feel because according to my partner i'm slagging her neice off. well i've given up any hope of this relationship working ,i'm fed up with she refuses to help me,yet anyone else wants help and shes there. i'm not gonna finish with her straight away i tried that a few weeks ago but she refused to go until she had somewhere to store her own stuff excuse being that i would wreck her stuff. but i think the real reason was because she knew she had overstepped the mark and was hoping i would change my mind her tactics worked. but that has given me insight now to what she will do when i actually tell her we are finished i will have a list of storage places and removal firms and tell her to ring them and give her a set time to move out. once she said when i told her to get out she wanted £1000 to move out to get a deposit on a flat. but she can go live with one of her family as shes always put them before me let them help her out. for now i'm withdrawing emotional away from her ,to protect myself.