Song of Solomon 1-8 (The Daily Walk Bible).
I think that it’s best to take this book literally, rather than allegorically. If you try to make everything stand for something else, it can get a little weird. If the poem is about Christ’s love for the church, what do you do with a verse like 1:13? (“My lover is like a sachet of myrrh lying between my breasts.”)
I believe the best way to see the flow of the book is to view the wedding in the middle as the focal point, with the end mirroring the beginning. The outline is then A B C B A with “C” being the wedding in the middle.
The main lesson seems to be that romantic love is important too!