Hi, I used to sort of think there was a God, but I changed, too. I am completely unhappy like yourself as of late, but I don't believe in God. I think quite honestly that it is a waste of time to believe in something that we can never prove as long as we live on this Earth. Many things have changed me over the years, one thing being that I would hear some church-goers say "I know God exists" and trying to be thankful for what they have and thinking he has some master plan for everyone. But then I learned about philosophy. No one can prove to me without a doubt in my mind that this "God" exists, nor any other thing exists, really, but that is going to deep for a small response on a forum. I have to say another thing that really changed me was people that would come up to you at random places trying to preach to you and get you to be "saved" on the spot and they'll say "oh, let me just pray with you" and then ask you if you know where you're going when you die. Damn, I don't know where I'm going with this... you just strike so many thoughts in my mind. There is a logical explanation for whatever it is that you're going through. All things (seemingly to me anyway) are simple cause and effect. You may not be seeing the bigger picture.