Yes, like the others have said, its all about putting yourself out there. I didnt have a huge circle of friends in the UK but here I have really made the effort. I have lots of 'expat' friends but also Aussies too. I volunteer at the school - just reading once a week but its gotten me well known there. I volunteer as a driver for meals on wheels - again it just gets my face out there. My daughter swims 3 times a week in squads, does gymnastics and horse riding. These have all been opportunities for me to meet new people. I've only really got ONE true Aussie mate (and her family) but I have lots of Aussie aquaintances.
The main thing is to not be shy - just get out there!