"好吧，我高中的音乐不一样；我那时唱的是关于爱情的歌——你知道，现在我已经不在乎这些了。"

Simplified Meaning:

When this person was in high school, the songs they created were mostly about love because that was important to them at the time. However, as they grew older, their interests and feelings changed. Now, they no longer care about the same things they did back then, so their music has changed too. Think of it like this: when you are a kid, you might really love playing with certain toys. But as you grow up, you lose interest in those toys and find new hobbies, like sports or reading. It's the same with this person's music. They used to be focused on love, but now their music reflects different parts of their life, stuff that matters to them now. It shows how people change over time and how what we create changes with us. A person reading this can understand that it's normal to outgrow old interests and find new passions. It's a reminder that change is a part of life and our focus can shift as we grow older.