Do you think this is fair?

I'm going to two schools, a university and a community college and I have to do a gazillion extracurricular activities to do a masters at the uni I want to and I'm expected to work at the same time. I have to pay for everything! My dad bought me a mac a few months ago and I have to pay him over �1000. I asked him for some money to get my new gles and he was like use your own money, which I dont even have. I used to work but I couldn't handle the workload, so quit. I just keep having to ration and I'm so sick of it. It's like this with me and my sister but if my brother runs out of money, they'd happily help him out. I don't expect my parents to get into debt for me but I've only just turned seventeen! Is this fair?