Hello Eclectic, welcome. I left the JWs three years ago after 22 years on the inside, recruited at the doors, believe it or not! I believed it completely for many years, then began to look around me and wonder. Even when I realised I didn't enjoy it at meetings and conventions because a lot of what was said and written was self-congratulatory, self-affirming stuff, I felt I still could not break my ties completely.
The turning point, as it was with many ex-JWs, was reading Ray Franz's "Crisis of Conscience." Franz, if you;re unaware, was a member of the Governing Body who, like you, became uneasy with what was going on in the organisation. He began to think, and reason, and then question. For that he was punished and publicly vilified. Many JWs still believe he is the devil incarnate.
His book, however, (easily obtained) is a very sincere and fair examination of the highest echelons of the religion from the inside, and reading it rips back the curtain on how the religion has become what it is and why it treats people the way it does. Once you've read it, it's very hard to see the religion in the same way.
Be warned: Franz was disfellowshipped and therefore Witnesses are forbidden to read it. But you must ask yourself if a "Christian" organisation has the right to determine what you read in order to make informed decisions about your life. What do they have to hide?