You have a lot to learn from this person; in fact, this is a really important relationship for you, and its effects last even if the connection doesn't. You're very comfortable with this person; you could even feel as if you've known them for years -- it's even possible that you did know each other, long ago, or that you've shared friends in common. But this sense of comfort and familiarity could simply come from a commonality between you, a feeling of natural unity and warmth.
You feel with this person as if you're able to be yourself and follow your own path, even while respecting the loving bond between you -- and that's rare, so enjoy it! Talking about your experiences and drawing from your lover's past is very beneficial for you, and it should be pleasurable for them. You make them feel wonderful because you're so grateful to them for inspiring you on a daily basis, which they do. They show you how to live better, to be the person you really are instead of always trying to please everybody else. Your natural way of being pleases your lover, so you're able to relax in their company and settle into yourself.