Your friend will be able to provide you with a lot of support and will encourage you to pursue your ambitions -- and not just career-related ambitions, either. You'll be on a personal growth trajectory that is heightened by your connection with this person. What's more, the support that they'll offer you will actually have the effect of increasing your growth spurt -- in other words, though it may be counterintuitive, you'll be able to grow more as an individual through the friendship than you would have on your own.
Unconsciously, your pal is able to identify your needs and respond to them in a positive way. The communication between you -- both verbal and nonverbal -- should be strong.