Song of Songs is a beautiful and romantic interlude. It lets a young bride show us her love for her bridegroom. We don’t know who they are: he could be Solomon, she could be the Queen of Sheba or a peasant, he could be a peasant. It isn’t even always clear who is speaking, although the translators have done their best to help us out.
One thing, though, is that the whole book is about love:
8:6-7 Set me as a seal upon your heart,
As a seal upon your arm;
For love is as strong as death,
Jealousy as cruel as the grave;
Its flames are flames of fire,
A most vehement flame.Many waters cannot quench love,
Nor can the floods drown it.
If a man would give for love
All the wealth of his house,
It would be utterly despised.
Some useful introductions to the Song of Songs are:
That Bible blog 