These are musings which might seem interesting but they have little scientific value, Josephine. This topic might fit better in the Philosophy of Science forum.
Zero is indeed an important and valid concept, and is one of humanity's greatest inventions.
And - not all explanations of black holes create infinities. String theory avoids infinites.
I also reviewed a book a while back by Ernest Sternglass, "Before the beginning". He does not believe in an initial singularity (ie that there is a singularity at T-0). Review is here:
http://www.hypography.com/article.cfm?id=28091
I would also recommend a brand new book by John Barrow, "The Infinite Book" which discusses the history of the concept of inifinity, and also many of the issues and problems it raises in both culture, science, and religion.
