Uvakat,
FWIW, I don't think your parents hate you-but they do sound very insecure. As far as your mother's behavior goes, I can only take a few guesses. I think your mother feels anger/guilt/shame over the situation of your half brother: was he conceived out of wedlock? Did she give him up or was she forced to by her parents? Your desire to meet him must stir up some powerful negative emotions!
You never mention your father, but if your brother's birth was somehow a shame on your mother I can't imagine he would be too happy to see his wife's first child (by another man). Is your father actively on your case, or is he just bullied along by your mother, too?
The fact that you are smart, willful, and able to take of yourself probably scares her more than anything, because what kind of proper high class (ASIAN) man would want a wife like that??? more than anything else, your job is to provide grandchildren and take of her in her old age. How disgraceful of you!
22 years old-a spinster, or worse.
Now, you could play head games with her, like agreeing with her every criticism and serenely smiling while you do so, but with the amount of schoolwork you have you probably don't need any more distractions (although this could really be a lot of fun
).
And if marriage proposals are the problem, tell her you just got one tonight. She might shut up if she heard it came from an Jewish guy who isn't a doctor or a lawyer or merchant. Where should I "mistakenly" send the passionate declarations of my love?