It is a lot easier to prove that you don't love someone than it is to prove that you do, but one of the best 'proofs' I know is the desire to devote time to the person with no expectation of any sort of compensation, including gratitude, in return.
Marilyn vos Savant...there are days when I feel I can do anything and days when I feel I can do nothing. But fortunately for those around me, neither sort occurs very often.
Marilyn vos Savant