You two form a great communicative bond, because you really want to know what this person has to say about things. You go to them for advice, for a laugh, for their unique perspective on things -- and you both have a great time talking. But more than fun, the particular mental energy created between you is able to be used for a specific and beneficial purpose.
This person helps you become more fully self-realized by encouraging you to think both broadly and in specifics. Translation? They help you come up with a game plan that works, but they also help you learn to do that on your own. You spend a lot of time talking about your intellectual and literary ideas, too, and you see this person as being really interesting and smart, and you're hungry for their perspective. There is a familiarity between you from the start, in your conversations and the kinds of ideas you each occupy your minds with -- you find that you have like minds, and you're instinctively comfortable with each other, even while your interactions spark excitement in both of you. Over time, you likely realize that the subjects you discuss together are even more important than you realized, as they help to form your lives and your paths into the future.