It's far too difficult to get a job!

I've been jobhunting for over a year now, when am I actually going to get a job? I work the occasional Saturday in my dad's shop but one day a month or whatever doesn't really count for much and I don't get enough pay from it to really do anything. I've handed in a CV almost everywhere in the city, I swear, and it's not that I look bad on paper - I have lots of good grades and plenty of references. A couple of people have told me it might be that I look 'too good' and they'll be looking for someone who won't be moving on to better things, but that doesn't explain how I know people that have more qualifications and at higher levels than me that jump from job to job? People with less qualifications and even some people I know with no qualifications at all seem to manage to always have a job too. I don't get it. I'm just getting really downhearted about always being poor. Most of my friends have jobs or they're on some benefit or their parents give them money and they're always going out and doing things, whether that be having a few drinks or going to the cinema or going away for a weekend. I just feel like I'm missing out on everything because anything I want to do, I can't. I honestly can't remember the last time I could afford to buy myself new clothes or go out somewhere. I get invited out all the time and always have to say no, I'm scared that by the time I actually have a way of getting money for these things my friends will have given up and stopped asking. Out of desperation I looked into signing up for some benefits, but I'm not old enough for any of the ones I would otherwise qualify for. I would hate to be on benefits anyway, but that's how much this means to me. My laptop is half dead, as is my phone, and I don't like most of my clothes anymore. But I can't afford to replace them. Living at home is starting to drive me insane but I can't afford to leave and get my own place. I'd love to drive, it would make getting around so much easier as not many of my friends live close and there's so many places I'd like to go, but again, I can't afford it. I'm stuck in a rut and it all comes back to the supposedly 'little' issue of not having a job.