In the song, Taylor sings about how she would stay up late with him, thinking that she would be with him forever. She also sings about how she thought she could change him and how she used to think he was perfect. However, Taylor eventually realized that she couldn't change him and that he wasn't perfect. She also realized that she was better off without him.
The Way I Loved You is a song about accepting that a relationship is over and about learning from it. The song is also about realizing that you can't change someone and that you're better off without them.