Is it wrong to be extremely jealous of my younger brother??

You know its wrong to be jealous because he is your brother and we are supposed to love our siblings unconditionally HOWEVER, you are human and all emotions are valid. My guess, because I went through something similar is that perhaps your parents have no idea about what they are doing to you emotionally. You should probably try to talk to your parents and convey to them that although you decided to lead a life other than what they wanted for you that you are still their child and right now is the time in your life when you most need their love. If that doesn't change anything then try to make your own way. They will miss you and eventually see the error of their ways. Good luck.