There are a lot of South-Asians at Aston. My mate goes there.
Anyway, don't worry about being a loner. Just be friendly, talk to people before lectures and you should be fine. Also, join the relevant Facebook groups.
Please message me, I need to know someone like me don't want to walk around like a loner
You'll be fine, just remember everyone is in the same boat when they came here, you might want to consider joining a society when you get here, i found it the easiest way to make friends when i was an undergraduate. There is also a Pakistani society along with a number of societies to cater for any interests you have.
Don't worry about your first week, just make the effort to speak to people and you'll be fine.