Is true love only something you can feel for children and animals? That deeply protective, throw-yourself-in-front-of-the-bus-to-save-them kind of love that's entirely unconditional and pure?
Do you love your DH/partner in the same way? Or do we confuse affection and attachment with the word "love" when it comes to adult partners?
My feelings for DH are not unconditional and perhaps I wouldn't leap in front of him to protect him in the same way I would for our nephews or DDog. I would however risk personal injury to protect my parents for example, so perhaps that's an example of a more pure love between adult humans?
Is the strength of your love for your parents and your DH different?