Hello~! 
I'm also Soon- to-be Year 3 too but in NTU instead. But i met with
the same situation as you a year earlier. I like to share my
experience with you. Perhaps it was because i stayed in hall and
life was faster. I took part in facuilty camps, hall camps, made
alot of friends, mugged for exams to get the grades my mum wanted
but as time passes, i started to feel the same way you did. It's
especially when the so-called friendship made in uni become nothing
but an act and true friendship losing its existence.
I looked back at my uni life and realised i had done nothing
productive nor constructive at all. I'm living off my parent's
money to just play through Uni. Just when i was feeling as though i
was an useless pile of shit, my friend got me to apply for this
holiday job during the 1st holiday of my 2nd year. It was just a
normal sales job, not directly relevant to my course of studying
which is engineering. However, i must say it was the wisest
decision i ever meant in my life. It was a totally different life
from studying. You get to see the other side of people, of
companies. Sorry if i offended anyone with my next sentence but it
really went to show that alot of tertiary educated people like you
and me are a bunch of pampered and sheltered asses. My working life
was just like in the army where i served together with the hokkien
"bin". The world was so different. While we were playing, having
fun, enjoying life while studying, people out there are slogging
their lives out to lead ,ironically, a better life. We are so lucky
that we could go Uni and in future get better paid jobs that we
don't need to slog as much but we do not cherish.
Perhaps you may think i'm getting off topic. Hang on, the story i
mention so far actually explains why we had the "emptiness"
feeling. We were all too pampered and sheltered. After my holiday
ended, i went back to school and started seeing things differently.
Suddenly, i'm studying for my own future, working my ass off for my
own bread and water and then, the emptiness feelings are gone. From
that holiday on, i study and work part time not as much for the
money but for reminding myself that i must cherish my studying in
Uni.
For you, i'll advise you to find a job. It's never too late. I have
a friend who also only started working when he is in yr 3. There
are many advantages. One thing, at least when we graduate in a few
years time, we will have money in our pockets to tide us over when
we look for jobs. Second thing, we will not so get a culture shock
when we step into the working world.
Don't email. The basic courtesy is always to call up or walk in for
interview. Success rates are higher. Maybe after you find a job,
you will feel the way i did. I wish you success in your job
finding.
Cheers