Complex sentence: When Ray left Ireland to follow Dermot to America, she had her doubts about moving; but Dermot convinced her it was where their future lay, and she was too young and too much in love to fight.
Split into simpler sentences: When Ray left Ireland to follow Dermot to America, she had her doubts about moving. But Dermot convinced her it was where their future lay and she was too young and too much in love to fight.