Disapointment

I have been told from a young age that I am a good person, that i was lucky and gifted. I have an amazing memory allowing me to remember formulas and English rules that just make school easier so I excel academically. along with that i have always been good at art, not amazing but i get A's across all my art subjects from the past 3 years. I also play multiple instrument and have fast reflexes and am fit. Some people have even gone as far as to call me a paragon. but i cry myself to sleep because of the way my mother makes me feel. she is a very passively aggressive person, for instance the other night while we were having a family dinner she made comments about a few of my friends and the schools they are going to next year. just so you know i am an Australian teenager so high school starts at year 7, i am in a program designed to excel academically advanced students but it only last to the end of year 9 so my more well of friends are going to private schools after this year or have gone for scholarships to better schools as the one i attend is a public school in a not so great neighborhood. she always says things to diminish my existence while praising everything about my sisters and brother. when i tell people about the things she says, examples being "why don't you be more like a girl" or "I wish you were a better person" or even "you better not ruin this for yourself" most of them say she is looking out for me or that she wants me to have a good life, but she doesn't she couldn't care less about my life. i talk about my future and her only concern is if i can make it cost her less money, so much so that she said if you want a good job choose a better degree than law and so it through the army, again making it seem like she wants the best for me but she does it with such inconsideration and ignorance and with tone that makes me think she wishes i was never born. people think that it's nothing and that at least i have my dad who encourages be to love who i am but i can't figure out why she hates or why i care why she keeps me up at night, why whenever shes home for dinner i cry myself to sleep.
can anyone help?