You should both tell us what it is so that others may give a different opinion
But person I actually trust and can talk about more private issues openly, someone that may be fun or not but I feel deeper non-romantic connection to seems to be missing.
A better way to look at those categories is that they are dominant archetypes (like eigenvectors) that are variably fractionally fulfilled by each relationship. The archetypes are "real" in the sense that they accurately describe/compress reality, much like many datasets can be quite accurately compressed down to some major eigenvectors.
And backstage intimate is horrible term too. My friends are not intimate nor backstage. Intimate is something else entirely, it does not fit the relationship at all. I talk more openly with them, but I am not intimate in emotional sense with them at all.
The backstage part have similar issues. In what sense are they backstage?
This subjective drivel must have been written by someone who does not have those kinds of friends and does not understand them. I would categorise friends and acquaintances completely differently.
> You just like talking to them, spending time with them.
Maybe the author considers that transactional...
The greek storge variant of love comes closest to what I am talking about. I have three friends like that, I trust them on a deep level, we often talk about our deepest feelings, in complex ways they love me and I love them. I even share physical closeness with them, when we meet we are as close as a long distance couple that just met again in real life. With two of them I occasionally have sex when we see each other, opposed to my FWB I do not have a connection to beyond sex. They are beacons of light in my dark life and among the most valuable things I have.
> With two of them I occasionally have sex
these are two conflicting descriptions.
Google Plus and it's "circles" of contacts was a better design in that regard.
I think most real friendships among adults last when people also do business, projects and networking together. Just sitting and reminiscing on old memories, gossiping, or commenting on unimportant things gets old quick.