Your buddy is headed in a certain direction in their life, and their involvement with you can only help them to progress even further, because you'll tune in to their ambitions and what's good for them on a very basic level. You'll simply naturally understand them and what they need to do in their life. You'll also be able to help them make strides toward their future just by being yourself -- by supporting and encouraging them, and by being there for them emotionally.
This will be a soft, subtle influence, but an important one nonetheless. You have an intuitive recognition of the subtleties and complexities of life, and you're interested in the interconnectedness of all things and people; and your pal will derive a lot of truth and guidance from your spiritual ideas. You could both feel as if your friendship is familiar and comfortable from the start, because you'll just tune in and recognize each other so easily and naturally. That will help to establish a close kinship between you.