I know quite a few INFJs. My roommate is an INFJ, and my officemate is an INFJ, so I'm constantly surrounded. (I'm not complaining. :tongue

Things with my (newish) officemate have always been cordial and pleasant, but not until we were forced into a business trip together did we probe beneath the surface and get to know each other better. Another INFJ I've known for seven years was introduced to me by an ENFP, and we quietly did things as a group for a long time before we got to know each other very well. (And she's fantastic.) Something I've noticed about INFJs is that it takes a long, long while for any of us to let our guard down. So most of the INFJs I feel close to, I've taken a long time getting there. There's a gentle pushing for a while, then at one point, it was like falling through a mirror and everything was revealed. Worth the wait. :happy:
Although, like
thegirlcandance mentioned, there WERE times it felt like something was missing. I think what I was picking up was the sense of someone holding something back. I remember meeting the INFJ I've known for seven years and being mystified by her pokerface. And later, she told me I had more smile variations (angry smile, patient smile, frustrated smile) than anyone she knew, and was hard to read. I know when I can't read someone (and desperately want to), I feel lost. Still. That feeling has passed with every INFJ I've known. It's such a relief to hear someone else say, "Oh, I know JUST how that feels", and you know they really know, and they know you really know too, and you can grin stupidly at each other with absolutely no judgment and complete relief.