We had that discussion in RCIA on this too, this past spring. We discussed the idea that some of the literature contained in the Bible is (may be) myth. I am no expert, so I cannot say much more than that I do understand your question.
I have a friend who is a Priest in another parish, and when I asked him about this, he said not to focus on whether or not Adam and Eve were real persons (which personally, I tend to believe they DID in fact exist), but to focus on the intention of the writing. Why was it included in the Bible? Why is it scripture? What does God want us to know about Him from this story? Father said it may help to read the scriptures in the presence of the Lord, before the Blessed Sacrament, and to make prayer a part of Bible study.
Not to confuse you any further, but in reading Pope John Paul II’s Theology of the Body (which is amazing) particularly the first footnote following Part 3, “The Second Account of Creation: The Subjective Definition of Man,” there are some interesting comments on the role of myth in teaching. Here is the web page:
ewtn.com/library/papaldoc/jp2tb3.htm
Clear as mud, huh?
Hope