I think what is hardest for us NFs in relationships with your type is the
apparent lack of concern about the relationship.
Because we tend to live it, you see, and your type apparently puts it on a
back burner and has a life outside of the relationship.
For instance my ISTJ is away at work right now, far away, and seems
not much concerned about me, I think/feel. He said he will call me when he returns, and that's that.
I have slowly trained him over the last six months to at least leave me a phone message now and then, so he is improving.
But if not for that, I doubt that I would hear from him until he got everything done that he needs to get done, including all household chores, etc.
and shopping, and anything else that might possibly need to get done in the next year, and THEN, he will call me and schedule some leisure time with me.
For me, and for most NFs I think, I would be calling him first and at least scheduling the time and then worrying about the other stuff.
Does this make sense to you? And thanks for your helpful input.