I started reading with the intent to tell you just how off base you are, but I see now where you are coming from. Perhaps it’s the meaning of the terms that threw me off. I heartily agree with being team-mates, but to me that’s what a best friend is. I revel in getting to be an individual within my nearly 30 year relationship. I don’t want to be his “other half” or anything remotely co-dependent, but I think if you don’t really, really like someone then when the inevitable ups and downs come, it’s harder to navigate without that part. I’ve heard about people “falling out of love” when their mate gained 30 pounds, for example. If you are really truly best friends, that part matters a whole lot less. You still adore your friend, even if they’ve put on a few. My husband and I are still pretty hot and heavy for each other, but we’ve definitely gone through times where we weren’t. Being best friends is what helped us through those times.