Good statements. As for me, I can define true love as a feeling of limitless kindness and happiness you can bring to people without any expectations from others. Your love makes you happy in this case. And when we try to change people, force them to do something in relationships - it's just a manifestation of selfishness, I think. Therefore, I can say that some couples fall into love addiction but not into true love. I found very interesting thoughts about this question in one article: https://ivypanda.com/essays/analyzing-love-and-love-addiction-in-relationships/ . It also includes books related to this topic.
However, love is the subject we can speak about eternally