Hi thewalker and welcome - you wrote very clearly and as you can see from the excellent replies you already have, most of us have been where you were...
It was the lack of love in the congregation which started my doubts a few months ago, I was looking up at a prominent elder speaking about love at the assembly, knowing that he is one of the nastiest, most abusive people I know and helped to push 3 young ones out of the congregation. Unfortunately it wasn't just one incident, one brother, but a pattern and I found myself thinking - "is Jehovah really blessing this organisation?"
Finally I allowed myself to research this religion independently after 25 years as a witness - what I first found was the problem with mishandling of child abuse in the witnesses. You and I have both seen people hurt and mistreated in the congregation, it hurts but usually it's not lifechanging, but what about when elders have mishandled child abuse reports from a youngster? Leaving a young victim unheard, unprotected, continuing to be molested, then mistreated afterwards... Google it - there are lots of stories like this one:
In Australia they have just had a Royal Commission Enquiry into the witnesses handling of Child abuse. It court-ordered files from the bethel which found files on 1006 known Jehovahs Witness child abusers in Australia and NOT ONE SINGLE CASE had been reported to the authorities. They held public hearings which were damning and identified 'grave concerns' with the witness policies.
Now the UK Charities commission is investigating the same thing in Britain...
Again, how can Jehovah allow this kind of mishandling and cover ups if this is his organisation?
Then there is shunning within families, where youths like you who have had doubts or done something 'wrong', have been disfellowshipped, cut off from all contact from their families when they are at a time in life where they need love and support - some have become depressed and even committed suicide...
Again where is the love?
After finding out about those two major things, I found this forum, and I was recommended jwfacts.com and Crisis of Conscience (a book by a former Governing Body member Raymond Franz). These two things confirmed the fact that the witnesses cannot be the 'only true religion'. I still love God and Christ but I now feel free of this oppressive organisation which specialises in making people feel guilty and never good enough. I look at my neighbours and fellow man in a completely different way now - not like they are under the devil's spell so I can't be friends with them.
Listen to your doubts, you have friends here who will sympathise, It is a painful process, waking up to 'the truth about the truth' but it is very freeing also! (the truth shall set you free.....)