You, my friend, probably do not lose sleep thinking about cosmology as I have (Though I know it is not logical). However, perhaps you should consider "Forever and for always" and its implications. My wife and I selected that concept as our wedding theme and song forty years ago, and it is one reason I remain her caregiver through these challenging times.
Science is like any other human activity; it is dynamic and not static. Contrary to what was once believed, it isn't absolute either. Things change: theories and data are updated, new tools make changes, and the use of mathematics is also fluid.
Once, we thought the Earth was the center of the Universe, followed by the Sun and then the Milky Way Galaxy. With each update, our perception of reality is altered. Take, for example, "The Big Bank" theory and the expanding cosmos. To read about this carefully, the suggestion is that the Cosmos began from nothing and will end in nothing (functionally) sometime in the distant future. Relavent for us, NO! Don't lose sleep thinking about this.
New data and theories suggest the universe is infinite (many spin-off topics are addressed in science fiction literature and cinema). The James Webb Space Telescope (JWST) has added mystery to the origin of the Universe. Was there a "Big Bang"? What existed before this theoretical birth of our Universe? No one knows - we have only theory.
Perhaps your past lovers are still making love with you in the past. Or maybe with another you in a parallel Universe?
Where is the center of the universe (where the Big Bang occurred), and where is its edge?
As counterintuitive as it may seem, the universe has no center, and it has no boundary.
I know that the center of my reality (including my thoughts about the Cosmos) is in my mind based on what I believe is true.