Even if this relationship doesn't last long-term, it is still an important one, especially in your partner's life. You talk about more than just mundane, silly stuff; instead of chitchat and innuendoes, you discuss important things like your interests in life, your ambitions, where you want to be in five or ten years. You find an interesting connection in where you have already been and where they want to go.
This might be in a literal sense -- they want to travel to Africa, and you spent a few years there in the Peace Corps -- or a more figurative one -- your lover wants to go back to school, and can get advice on the pros and cons from you, since you've already finished with your schooling. Either way, you have a lot of advice to offer them, and they feel closer to you because of these similarities. You even feel familiar to them, as if they've met you before, but it will really just be the fact that you get along so well and you really understand their aspirations for a good life. The support and encouragement you offer them will also make them feel wonderful, so make sure you always do that for them. You should both take care not to get complacent in your sweet, nurturing bond; stay focused on developing yourselves, and you really gain the most from this beneficial influence.