Don't feel responsible. Yes, you were tricked and indoctrinated. So was I. I promise you, you haven't done what others have. I was an elder and missionary.
But you could look at it this way too... Remember Ray Franz? He was on the GB. For years, he tacitly gave support to an organization that harmed others and knowingly lied and ignored evidence, ignoring the growing voice that was his conscience that something wasn't right. At some point, he listened to that voice, and left.
Did he feel responsible? Yes, and he did what you and I and others are doing now, exposing the WTBTS for what it really is. He told his story. Did everyone leave because Ray Franz left? No. They left when they were ready. But at least a path was blazed for them. Suddenly, even though those who left were isolated, they weren't alone.
So please, don't be too hard on yourself. Blaze a trail for others in your own fashion. Do what you can. You won't be able to do what others do, and maybe you can do more then still others. It's up to you. It's exciting in a way for you to unleash your individuality.
My advice for your loved ones that you are concerned about, a small lesson I have learned and am still learning, love them. Forgive them. Forgive yourself. I don't mean for that to sound trite. But its important. Some won't always feel the way they do today, and if and when they wake up, who will they turn to?
Hopefully, you! But there is some trailblazing, some heavy lifting, some leadership to do. Leadership is a misunderstood thing, because often, it is exhibited when no one is around to observe, until you are needed for others to run to what you have built.
However, do it for yourself first. You are allowed. Don't allow looking at your past to take the attention off you. You have needs to, so don't ignore them. Heal first, and give others a picture of what that looks like. That vision of a happy you could be what will help the most!
Good luck. :)