The speaker is addressing a lover she describes as a "prince," someone damaged but worth loving. She admits twice that she doesn't know how she ended up in his arms, which gives the poem a dazed, tender feel, as if the love caught her by surprise. She sees him as split in two: first "broken, discarded glass," then "burning, scolding fire." Both images suggest someone fragile and dangerous at once.
The pattern repeats in each half. At first glance he seems brutal, stubborn, cruel, or glowering, but a "trained eye" sees more: the strength of a lion, the delicacy of an angel, and a love of rainbows. The speaker believes there is softness hiding under his hard surface, even imagining wings beneath his shirt.
The ending turns into a plea. She asks him to "break your chains" so they can be free together, and she closes with a neat line: love makes people fools, but those who refuse to love are clowns. The mood is hopeful, devoted, and a little bruised.