Things that never interested you before become fascinating because you know they are important to this person who is so special to you. You think of this person on every occasion and in everything you do. Simple things bring them to mind like a pale blue sky, gentle wind or even a storm cloud on the horizon.
Joy seems to me a step beyond happiness- happiness is a sort of atmosphere you can live in sometimes when you're lucky. Joy is a light that fills you with hope and faith and love.
Do not worry about not holding high position; worry rather about playing your proper role. Worry not that no one knows of you; seek to be worth knowing.