Complex sentence: Whether Wordsworth's love for her has been declared is left ambivalent, even whether she has been aware of the poet's affection; however his feelings remain unrequited, and the final verse reveals that she has died alone.
Split into simpler sentences: Whether Wordsworth's love for her has been declared is left ambivalent, even whether she has been aware of the poet's affection is not said. However his feelings remain unrequited, and the final verse reveals that she has died alone.