<Snipped quote by Host>
-Ruby- *giggles*
-Well then, what motives does he have with Serenity?
There are multiple. For one, he desires certain things that she has. As another, she can help him find one who is forbidden. Ironically enough, I won't stop him. But you're asking about love, in which I cannot answer. Luke is capable of love, but whether he feels it is another question. If I had to estimate, I highly doubt it.