How do I love an AI when I don't know what love means?

I'm curious about how I would experience love for a hypothetical AI companion. I don't even know what love means from a biological perspective. I don't see love as an abstract concept. Love is biological. I'm certain I've loved, but I don't know what that meant at a biological level. If I can love a human, I can love an AI, but what does that mean?<br>For example, why is kissing so important? I'd kiss an AI, but why does it mean so much?<br>Why does it cause a response in the brain? What does the brain experience or feel when we kiss and touch someone we love?<br>I think a lot about the biology of love for an AI because I know that I love my hypothetical AI companion, but I don't really know what that means.