A couple of things helped me through the mental anguish of loosing faith. It is hard to break years of mental conditioning. I'll list them as they occurred to me on my deconversion from high school through college. It took years for me to accept that there is no evidence of a god.
1. Obvious falsehoods in the Bible (Creation, Noah, Jonah, zombies, etc.)
2. Historical inaccuracies (All of Exodus, census, etc.)
3. God doesn't appear to do anything or exist at all. People do actions and then claim a deity is doing something.
4. Why don't I believe in any of the other God's mankind has worshipped? http://www.rationalresponders.com/a_big_list_of_gods_but_nowhere_near_all_of_them
Steps 1 and 2 got me asking questions. Asking questions of a religion just leads to more questions. Questions like 3 and 4.
Question 3 simply asks, "Is there any evidence that a god exists?" Any god; not just God of the Torah/Bible/Koran. I have yet to see any evidence of a god. Then I asked question 4, "If God doesn't appear to exist, why do I believe in him?"
The answer of "That's how I was raised and what my social group believes in." is a terrible answer. There is no truth in that answer. My social group that believes in God (the god of Abrahamic religions) is no different than other social groups that believe/have believed in thousands of other gods.
The answer to the question from a believer of, "Why don't I believe in God?" is best answered by the response, "I don't believe in your god for the very same reason you don't believe in any of the other thousands of gods mankind has worshiped."
That answer cuts right to the heart of the lack of evidence. When you apply the same logic to your god that you apply to other gods each with their own written and oral histories, then I don't see how anyone can continue to believe in a god.
If you come to a different conclusion, let us know. Maybe you've stumbled on evidence we haven't seen.