WHY ME????? AGAIN!!!!

Oh, now it's back to my old depressing life again. Everything was going realli great for me and then *BAM* u realise not everything is as good as u think it is. What I'm saying is, my family has never for any instance been grateful for what I've done for them, even if it hit them in the face. All they see is something that I ought to be doing for them, and not something I did it coz I wanted to show them that I cared. My sister even had to question my motives last week when I got her 2 bars of Cherry Ripe for no particular reason. Of course, at the time when I boght them, I was thinking of how she told me she (qoute) "LOVE THEM" (unquote), and since I knew she was flying home next week, I thought she might like some snacks to stock up for her trip. And there she had to ask why I even got her the chocs. I'm like thinking if I realli needed to explain myself...it's not like I planted strips of bomb in there so she'll die after she eats them or anything. GEE....so I told her that they were on special, and u kno wat she said? She called me a compulsive shopper. Yea...an insult and no thanks for it either. Such gratitude, huh? Then there's my little sister...from what my mum told me, I was the only one who wished her Happy Birthday on her birthday and actualli got her a present. My other sisters? They didn't even bother, and yet...my little sister's fave sister happened to be my eldest sister. For wat reasons, I have no clue. But u see the pattern here? No gratitude watsoever? But anyway, even for Mother's Day I got my mum a gift which me & my younger sister were supposed to "share". I'd actualli paid for the whole thing, but of course I told my mum that we'd gotten the gift together...and of course my mum was quite touched, but she showed no emotion of gratefulness for all the trouble that I did to get her her present over to her back home. My sister? She hasn't paid me back the money or even knows what my mum got for Mother's Day (shows the lack of interest). Everything that got to my mum was all the work I did. I saved up enough money, got out to buy this apron which I'd been looking for for weeks, and this fine china plate I snatched at a bargain, and the wrapping paper and decorations which I spent over an hour wrapping at the post office, and the packaging and delivery which I made sure that it was safe to deliver across the world in. EVERY SINGLE THING that made it to my mum was coz of what I did. My sister didn't even need to lift a finger or an eyelid. And yet, I didn't realli get much thanks from that, from my sister or my mum (naturally). And just today I was talking to my dad, and i discovered that my sister who is going back home will also get to go to Hong Kong for a shopping trip. And of course, I felt that I was at loss, since I cannot go back home and I dont even get to go on a shopping trip to Hong Kong. I obviously felt that I was not getting what could possibly be worth my while staying back in Melbourne. I even have to work and save enough money to pay for my OWN trip up to Sydney AND my shopping spree in Sydney (if i have enuff cash, that is); while probably at the same time, my sister is relaxing overseas, without having to cook her own food or even lift a single finger working, and then she can jet off to Hong Kong for about 2 weeks and go shopping and fine food dining everyday. I mean, HELLO? where the hell is the justice? I want what I should be getting. So I told my dad about changing my mind and wanting to go back home instead. I needed a release from all the straining work, and the cold harsh winter of Melbourne. I seriously didn't want to be left behind while someone else who is quite in the same position as me, having all the fun. I voiced my opinions and got rejected and also got told off with somethings that didn't realli have anything to do with MY problem, which upsetted me, and of course, I rebelled and my dad being not a very fair man as he say he is, avoids the question by going offline. And I'm like "WTF?" So u see....I think my family doesn't even see what I've done FOR them. I mean, I'm in a job coz they forced me to. They blackmailed me with my allowance being taken away. SO I took up a job FOR them. I'm even doing social work coz my dad told me to. I seriously dunno what I'm doing wrong to be deserving NOTHING at all. I haven't seen any rewards being reaped from the fertile soil I've sown. So someone, tell me what I should do? Expect? Ask for? Or demand?