Books like Too Young to Know (Wildfire) by Elisabeth Ogilvie

Riding through the early evening light, Mary Kate felt as if she were in a dream. The first sight of Rob transfixed her in one spot. He came to her and asked gently what the matter was. "I have to go home!" she wailed. He went perfectly white. Then he put his arms around her. "Mary, my heart. Don't cry." But there were tears in his own eyes.... Scotland isn't quite what Mary Kate expected when she first heard she'd be spending the summer there with her father. Her new friends are so different - especially Robin. Mary Kate doesn't know whether to feel bewildered by him or tender toward him. But slowly their love for each other grows - and by the time the summer is over all Mary Kate wants is to find a way to stay with Rob. She knows her father will never allow it, though. She knows he'll say Mary Kate is not old enough to make that decision, that she's too young to know.... [text from book jacket]

First publish date: 1982