Answering this question in the real literal sense would make me a really shallow person, mostly because love is not something that is synthesized in a mad scientist laboratory under your basement. It is something that is felt by a person in a deeper level. So such a question is relevant only in the case of a man or a boy who had known the woman for a good length of time. It is relevant only in the case of two people who had known each other to be able to live together through good and difficult times.
If you are someone who is matching the above descriptions then I can tell you that, it is only a matter of time the both of you realizes about the love that you have for each other. But if you are already hopelessly in love with her, then this question makes much more sense. The key is to let her know that you care about her in a much deeper and stronger level than what would be expected of just a friend. You need to let her know about the feelings that you have for her.
But you should be real careful not to express too much which would make her uncomfortable in the relationship. When you make a step forward let her take the next one. If she is OK with some kind of expression of intimacy you can express what you feel for her, like a gentle stroke on the hair, smooth kiss on the fingers. If she thinks that things are moving too fast, take it slow or else you might scare her away. But don’t hold off on your emotions either. You should make her understand how much she means to you and you will be there for her no matter what.
Care and respect are on the top of the list of things that women expect from a man. Treat her right and love her, she will end up loving you back.