I don't see the problem. We are committed to eternity and infinity. There is really no alternative. Even if there is nothing but cold black void outside the material universe, it must necessarily go on endlessly, and must have done so since forever and will continue to do so for always.

How long is eternity? How big is infinity? There can be no such question, or at least no satisfactory answer. In eternity and infinity time and size are meaningless.