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Prince William was determined to win Kate Middleton back for good.

In 2007, the couple got back together after their headline-making split earlier that year. And on Valentine’s Day 2008, the now heir to the British throne was eager to show his former flatmate that he was in it for the long haul.

Grant Harrold, King Charles III’s former butler who served a romantic dinner for the pair, has written a memoir, "The Royal Butler: My Remarkable Life in Royal Service." The etiquette expert told Fox News Digital that William wanted to prove to Kate that he was "serious" about their relationship’s future.

PRINCE PHILIP GAVE KATE MIDDLETON BLUNT WARNING ABOUT SURVIVING ROYAL LIFE

"When they got back together, it was fresh, it was

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