I was where you were at, at one time.
I compiled all the negative things in my life, used that as 'proof' that god didn't exist. It took begging for forgiveness for days before I could even feel a touch of warmth, that would keep me motivated to keep pursueing. You have to pray for others, be selfless, then a slight positive feeling will start. So long as you strive to help others, he will help you.