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“”” “Energy cannot be created nor destroyed”. If this is so, then wouldn’t it mean that energy is infinite?”

To physicists the statement is true, but to them it neither means there is infinite energy and it might mean there is only a finite amount of energy; it only means E=M*Csquared AND also that M=E/Csquared.

At present, the understanding of physicsts is that whether the universe is infinite (a “universe” that includes an infinite “vacumn”/”space” that matter/energy-energy/matter expands into) or finite (as though there is an ultimate boundary to the universe), but either way it only contains the energy it contains, though the arrangement of energy and matter (energy “condensed” or “conserved”) is constantly changing.

What astronomers see when they say the universe is “expanding” is not that it is containing either more energy or more mass all the time, but simply that the vacumn (space) between clusters of energy/matter keeps getting larger - everything keeps moving further apart.

Since present theories suggest that the amount of energ/matter-matter/energy in the universe is most likely finite, there are different theories about about the course the “expanding” universe will take.

“The three possible types of expanding universes are called open, flat, and closed universes. If the universe were open, it would expand forever. If the universe were flat, it would also expand forever, but the expansion rate would slow to zero after an infinite amount of time. If the universe were closed, it would eventually stop expanding and recollapse on itself, possibly leading to another big bang. In all three cases, the expansion slows, and the force that causes the slowing is gravity.”

http://skyserver.sdss.org/dr1/en/astro/universe/universe.asp

As for G-d; none of it proves or disproves G-d.