This friendship is built to last. You and your bud have figured out the secret to staying friends - communication. If something is bothering you (or your friend), you talk it out! That - plus a whole lot of chemistry between your personalities - means this is a friendship that has the potential to stand the test of time.
This friendship is not true blue. Either you or your friend (or maybe both of you) are dissatisfied with this relationship. Your answers show that you haven't learned to support each other, or to communicate your feelings very well. There is some reason you're hanging on to this friendship, but it will probably fade away if either of you meets a new friend who you have more in common with.