I found it easy to get along with new friends when I first started secondary school, i broke up with most of them and eventually all of them, I don't think it was due to the autism or aspergers but I think we all have different interests and/or habits and thats what separates us, though I had seen my old friends (from 2 years ago) still together and talk to each other, i've fallen out of their friendship to the point where we don't talk to each other anymore and the only time I did see them is when they were in the 6th form recreation/leisure room.
Now in college, most of my class are a year below me and they find it pretty easy to bond with each other and share interests, whereas I only made small amount of friends, but I won't consider them friends just colleagues, there's always the odd annoying guy in the class who's hating on me for no apparent reason and another whos just plain odd. In my experience, I know now that I tend to make friends who are about same age as me or older, but I have the challenge of making friends when I go university and in hope that these friends will stay as friends no matter what my interests or dislikes are or what kind of person you are without judging what disability you have.