All seems well for you and Thranduil as you return to Mirkwood, but there's an unsettling feeling that won't go away.

"He was as tall as a young tree, lithe, immensely strong, able swiftly to draw a great war-bow and shoot down a Nazgûl, endowed with the tremendous vitality of Elvish bodies, so hard and resistant to hurt that he went only in light shoes over rock or through snow, the most tireless of all the Fellowship." —J.R.R. Tolkien on Legolas

What you thought would be a happily ever after with your beautiful elvish prince turned out to be a nightmare when you fell for the handsome elvish King.