6 year relationship on hot water due to disgusting habits! help?

Im going on 6 years with my girlfriend. its been a rocky road due to many issues but it all came to a pinnacle this christmas, when i moved out because i was tired of her disorder, lack of respect for my few possessions( i am very simple, i prefer few in number but highly stylish clothes, i have no nicknack's, decorations or anything unnecessary. only electronics are this laptop and my cell.) and her inability to clean after herself. after a few months out, we were seeing each other, i was taking her out, we would hang out and eventually i started hanging out more and more in our old apartment. and it seemed she had turned a new leaf, house was always warm and clean, candles and Insense on, bathroom squeaky clean. made me want to come right back. so i did. guess what happened. yup. she did a complete 180 and started again. its a disaster, we have a loft on the beach, no dividers between areas except the bathroom, but its hard to find an open space due to her overflowing piles of clothes mixed in with clean ones.i have NEVER seen so much clothes in one place before, and when i was younger i worked in retail. she loves Nightmare before christmas, and those ugly pieces of crap are sprinkled everywhere on our shelves. so much fake and real jewelery. so many things she doesn't need. and shes an artist. so so many (admittedly amazing) but unfinished drawings, sketchbooks, paintings, canvases brushes etc! and here is the best part. not one, but two untrained dogs. young dogs, the pee when they see you kind. the pee on my laundry, on the bed, on me, all over the kitchen kind. ok im ranting. but i love this girl, she is incredibly sexy, very sensual, very loving always eager to please. we have fun together in our own way, shes very private and i am a socialite, i love meeting people and talking and when i bring her with me places, she completely ignores everyone, and shadows me everywhere.(btw i dont like this, but its something i learned to ignore years ago) but one thing she cant do is help keeping the place clean. i was out for a week on business, i come home, mess as usual. but it hit a final nerve when i pick up an item from the floor, and an army of roaches scatter, but like a flood yo! i was like WTF! ive been cleaning since this morning, its going on ten, and im still not done! and i am VERY thourough. the entire time um thinking, just leave just leave just leave. i cant though, i was planning on asking her hand next year... but i cant imagine living like this forever. what should i do to change her? or should i just do everything?