I personally don't know if he exists or not..
If god exists why is there still evil in this world? Why does he allow bad things to happen to good people? Is he willing but not able? Is he able but not willing? Is he neither willing or able to prevent evil, so why do we call him "god". There is no actual proof that he exists and I have a hard time believing in things like that, but that's not always the case. Miracles don't really ever happen unless its in a movie. Some people do experience things that don't usually happen..
So. Is there really a god? I don't know..