There is a big difference between 'long distance' and 'live together' relationships. If you were truly soul mates ( if even there is such a thing) you would get together one way or another. Only you know the value you place on each of the pros and cons. For instance , 'how old is your mother' does she need someone to live with her and help her. Long term would you do that etc etc. I think your gut feeling is that you want to stay in Australia and make a life for yourself. Maybe give yourself 6 months. If you don't get the job you want, then reconsider.