My relationship is in the toilet....

....and I don't know whether to fish it out and dry it off or flush it away.  My partner is really pissing me off and I'm sure she's not very happy with me, either.  Tensions are at an all-time high and I just want to move out at this point.  At the very least, I need some sort of separation from her, be it temporary or permanent. I have talked to a few people about this and was stunned, in a good way, when my father offered to get his house fixed up so I could live there.  He also asked a very insightful question: what has changed this time?  He knows that she and I have had issues in the past but now he is hearing something different in my voice.  I think I will feel a little better when I realize the answer to that question.  Then maybe I'll know what to do from this point forward. Oh, yeah, and did I  mention that besides being pissed off, I am also heartbroken that this is happening?