Complex sentence: She leaves with him, at first thrilled to do so owing to an unspoken crush she had for him whilst in her early teens, but when Ned rather clumsily tries to woo and kiss her, she flees.
Split into simpler sentences: She leaves with him, at first thrilled to do so owing to an unspoken crush she had for him whilst in her early teens. But when Ned rather clumsily tries to woo and kiss her, she flees.