Love of My Life question

Hi, ryunin. You're right on "blown over." It means when it has ended, like a storm that has "blown over" and is now gone. "Everything's all by the way" means much the same. Whatever has been has now been laid by the wayside (another storm-related metaphor) and no longer matters.

Everything's, "All-by-the-way" : Everything's casual, laid back.

The storm has blown over, life is back to normal and the present crisis is ho-hum, "Oh, by the way, you remember when....."

Thank you, I am going to do this song with students today.