Welcome!
"If anyone replies to this, I just want to know that someone out there has been through something like this and that maybe all this anguish and depression and feeling hopeless will go away. The only reason I feel so sad is because I have this dread that I'm choosing between my life and my family's happiness."
Many of us spent years going through such manipulation by the cult and by family. Being a JW was terribly depressing both when I was the model bethelite and when I was fading. Now, things are much better after years away, despite the fact that my parents are still enslaved to the WT lies.
Have you had a chance to read any of Steven Hassan's books? Although most of us may not be able to rescue all our families from the cult, at least it provides information to help us understand how cults work and how we can free our own thinking.
Not sure if you've ready any of these, or if they'll help:
http://www.jehovahs-witness.net/jw/friends/270595/1/exJW-Psychology-105-Are-You-Ready-for-The-Big-A