Time to start making friends at college, if you can. Miss more meetings, quit service altogether. Once you develop a decent support group outside the JWs it will hurt a lot less once you leave altogether. Your family will just chalk it up to the demonic influence of higher education. They may not cut you off if you don't get DFed,though they will always try to 'encourage' you.
I know what u mean about being the only one with eyes wide open among family who not only buys right into it, but fully depends on the cult for normality and hope. Just be glad you woke up while young, before you are married or have kids. There are many who would just up and leave in your situation because of the simplicity of it all.
Whatever you do, do not trust ANYONE with too much right now. JW apostadars are on high at the moment after the summer DC talks this year. Even your best friend or family can turn on you
Best part is, if youmdont talk about your doubts to anyone, don't give the elders any hints, they have nothing to DF you for if you play your cards right. Stay in as log as you feel it is necessary. If you can get your brother to go to college, he may wake up too. Then your folks will have a much harder time shunning you both.
Have you consider moving away to go to a different school next year? Maybe one that offers something you want but can't get nearby. Just a thought.