Am i in the wrong in this relationship?

well basically i met my now fiance 3 years ago almost now we started off slowly as friends and we met up loads and dated all the time and we both had so much in common and i loved being with her when i could but she lived 600 miles away from me at the time she came and visited me when she could and i travelled there when i could, times together were always so easy and we loved doing anything and everything together the same no arguements no nothing we were really good friends which turned into lovers gradualy i dont feel like it was rushed she was 17 and i was 21 though i dont think that matters too much and eventually after being friends for a year she came down here to live with me and my family and she has 2 dogs she had up where she lived before and they couldnt come down with her cause there was just no room but they were her dogs but they were stoppin with her parents still so they were safe, and the first week she was here she was still amazing and i loved everything about it, and this is where it all started to go wrong, at night like at 2 or 3 in the morning she just wanted to go wandering outside at all hours and i used to say its not the place or time to go wandering round come back to bed, and she went violent over it and who am i to stop her from going out so she kept doing this for months, also at the same time i played darts which is my hobby and has been for 10 yrs for a local team the only thing i do, she came out to one night with me cause i obviously wanted her there and she didnt want to sit in the same room as everyone else to socialise and she didnt want anything to do with it, so she said to me she wanted to go home but i hadnt played my match yet for the team and she just left and went wanderin round i was obviously upset that she went off i tried calling ringing her ad everything but eventually she came back and was all horrid again, and she told me then i had to choose between darts and her, and i said why do i have to choose i love darts its the only fun i have, and she goes if i cant have my dogs you cant do darts and im here on my own, and me being me i said okay so i finished playing darts for the team and she kept being strange chucking her self out the bed and stuff like that getting up at silly times and saying to me that she wants her own place and she wants the dogs back, im on minimum wage and not money orientated at all but i said okay i just want you happy, so then in the 2 weeks she was down here she kept saying to me how much she wanted a job before she started up college here so she got a job then moaned how much she hated it and i always picked her back up from walk always there for her when i could so she left there all the time im working full time, and she kept wanting to not do stuff with my family all the time during this and then my dad then bought a 2nd home and offered me and my girlfriend he opportunity to rent it and in december we moved in here, and in january her family moved 5 mins away with her dogs and all, so i thought she would be happy now and it would get better but she hits me and calls me stupid and makes it difficult for me to see my friends and family havent seen my best friend in a year and a half cause of her cause she doesnt like him, and i rarely see my family because she doesnt want anything to do with them for some reason and theyve only ever been nice to her, andwhen i suggest going to see them all she goes mental like the other day for my dads birthday she said if your going to drink im not going and you can stop at your mum and dads and ill stop at mine, before we even got there its so horrible to put up with but i love her with all my heart, weve broken up a few times but i always crack and i just want the best for her and to be there for her, and i also took her o poland in february with my sister and brother in law she wanted to go to places but said oh he wants to go here and there she couldnt just tell them she wanted to go some where, and she thinks im always having digs at her all the time when i know im not and she follows it up by hitting on me really hard to the head, i just dont know what to do for the best she still chucks her self on the floor just to cause arguements also and she also shoves objects in my face cause if i dont hear her correct i go sorry what and shes like going crazy about it just dont know if this relationship is salvageable not trying to create a bad light around her because it all started so promising just dont know how its got to this i need some serious help and advice thanks everyone in advance