If it makes you feel any better, I went yesterday and the only fliers I got were from the sydney morning herald or something, offering me student discount subscriptions xD
Not receiving a flier isn't the end of the world, so try not to think about it
When I walked into uni yesterday, at first I felt "fark, I am so out of place, everyone has a friend with them. wtf", but I just kept on walking around and made myself feel more comfortable with the place, then the BS thoughts went away.
I know what it feels like to be at uni with no friends - I did it a couple of years ago and it was fucking painful watching everyone around me. I was a very shy girl, and didn't feel like I fit in either (I was 20 and everyone around me was 17/18, not a huge difference, but take into perspective that I had already been through the motions of being out of school for 2 years, and I found it frustrating to go through it again).
Anyway, you could join a club or society. I joined some, and am hoping that I'll make some friends there. I'm also going to make a conscious effort to chat to people in labs and such. What do we really have to lose at the end of the day? We come across somebody who we don't like, or who don't want to talk back. You can take with stride that you made an effort to be sociable/friendly, and if they don't reciprocate, just do the same damn tomorrow with another person. It'll work eventually
Honestly, I really think people are just waiting for the other person to just say hello. I know I used to be.