Which is exactly why I said to avoid focusing on that banal term (love) in my first post. Just do whatever makes you happy (op.) If you're comfortable being with her and still having your alone time most of the week than who cares.
I think what you're going through is perfectly normal. In fact, the uncertainty that you're feeling about all of this is (in it's own way) a sign that you really do care about her. Obviously you're wondering if what you're feeling is socially considered morally acceptable which means you care about whether or not you're feeling something that may be unfair to her.
As I said before, just do your thing, man. Keep on doing what you're doing. It makes you happy so be happy. If a time comes where you want to make it a bit more serious than that's exactly what you'll do.
Have fun.