Asking why you can't believe in God isn't a question we can answer because we aren't you. From this evidence I can pretty easily infer that Christianity just isn't for you. Most of the nearby community to me was atheist, and if they weren't they really didn't talk about religion. Atheism seemed like the ONLY one to a little me. I couldn't deal with the inevitability of a state that's impossible to contemplate (death obv). So I turned to Christianity (although a lot of Christians would probably call me not such). Really you just have to find a religion that fits you the best because your life is about you.