When it gets to a certain degree you will care. When she no longer motivates you to live but rather gives you even less and less of a reason to live by the day, where your desire to be with her destroys any motivation you may have whatsoever, when you love her so much you want to scream every moment you are without her, you'll start to care. There's a point where you can't even cry anymore, just let yourself get destroyed and depressed. There's a point where you even know you would be better off if you never loved her, but you love her anyways because you don't care what you think, you just want to be with her above all else which is a pointless pursuit because you never truly will be with her.
Love is blind. A powerful emotion, but it is blind. It ignores what is practical, but stands strong through it anyways. It can destroy, but rebuild. It gives meaning to life, but is also something to die for.