This poem is beautiful, yet we tend to use Rumi poetry to express erotic love, nothing wrong with that, Just the Rumi Love poems where about his relationship with something much deeper, and more lasting.
I certainly think erotic love is deep and lasting, and so did Rumi -- he saw that as one of loves many forms, linking one with the universal essnce that is God, and what a lovely, heavenly way of expressing love. Erotic love is very deep. It is more than just "lust." It is the intertwining of souls.