Trying to prove the existence of God through logic makes no sense. the idea of God is something that is felt in the human heart and therefore beyond logic. If you feel the presence of God in your heart then HE/She exists, if not then He/She does ot exist. The real question is whether or not it is important to you or if you derive meaning for you life by seeking the felt experience of God. If this is not important to you,then the existence of God is irrelevant .
At some distant point in time, due to entropy, the universe and all universes will cease to exist. Unless there is re-creation, it will be difficult to substantiate the existence of God. Of course no one will be around to observe unless sentient beings are recreated.In that case how will they know that they are recreated beings since there will be no record of previous universes. Of course, that begs the questions as to whether or not we are the first incarnation of existence or merely the most recent.
Once I was accused of thinking I was God's gift to the world. Upon reflection, I realized the accuser was right. Therefore,there must be a God. I couldn't resist injecting some levity into the conversation.