You inspire your lover on a daily basis, to live in a better way that's truer to the person they really are. When you're just being yourself in the relationship, it is an inspiration and motivation for them to be themselves, and to find their path in life. Ah -- what a relief!
Some relationships make us feel as if we have to behave in a certain way and watch how we act; this isn't that kind. This one makes your partner feel as if the way they are is plenty good enough, and where they're headed is great. You act as an inspiring leader to them. The way you conduct yourself on a day-to-day basis, in itself, teaches them a lot about the kind of person they want to be and how they want to lead their life. They're really comfortable with you, and you both probably feel as if you've known each other for years -- and it's even possible that you did know each other, long ago, or that you've shared friends in common. It's also possible that this feeling of comfort and familiarity just comes from a commonality between you, a feeling of natural positivity and togetherness. Your partner slowly gains their independence as an individual through their connection with you, and you both learn to connect as individuals.