Ego forces you to think that you are bigger than God.
Do feel free to ask all that you wish of the Parmeshwar but then do ensure that your prayer includes the following: "O my dear God! I want You. Grant me all else that You will but 'You' I do want and that is for sure."
Merely acknowledging that God exists does not make me a believer; but wanting God’s presence in my life and wanting Him to play a controlling role in my life is what makes me a true believer