Did you ISFPs ever have friendships or other relationships with Introverted NFs? What was it like, and what did you feel the NF could bring you and you could offer the INF?
Yes, I have had three very different relationships with introverted NFs.
My mother (INFJ) is obviously the one that I have had the longest, and I would say our relationship has been through many rollercoasters but has never been lacking love. What she brings me is the unconditional love and support that I have needed on countless occasions when I did stupid things like quit my job when I had no money and have a child when I was still pretty much a child myself and with a woman even flakier than me. Over and over again, she has set aside her own interests and desires and spent time, money, and effort in supporting me and my son in whatever way she could, and I couldn't possibly repay her if I spent the rest of my life trying to do so. I can only try to follow her example and do the same for my son no matter what happens. We have our moments of frustrating the hell out of each other, but all in all I'd say things have been very good between us, and she's the person I have been the closest too for my whole life, as much as we may have strong differences in the way we view stuff.
My friend and former co-worker Dan (INFP) and I have had a lot of fun together and had many great conversations. I admire his consideration of people's feelings and his desire to find the worthwhile in people. I try to do some of that myself, even though my natural cynicism limits it somewhat. Dan is a really genuine guy who is honest and will try to help anyone who needs it if he can. He's also really fun to talk to, and to mess with, and it was enjoyable to work with him both as an equal and when he was my boss. I miss working with him and I always wish him the best in whatever he does, he is somebody I am glad to have known, and is the kind of friend everybody should have.
My friend and current co-worker Sasha (INFJ) is another fun, caring, and genuine person that I have had the pleasure to get to know better over the last couple years, and I really appreciate her willingness to talk to me about all kinds of stuff. Having her in the office has not only helped alleviate some of my workload, it has also made the work I still have to do more bearable, because I can pass some of the time talking and laughing with her about whatever stuff is interesting to us on that particular day. She has criticized me sometimes, but knowing her better now I realize this always comes from a good place, as she wants people to be in harmony and not in conflict with each other, and when she gets on me for being mean or not helpful with people, she really is trying to help me and not just trying to put me down for no reason. She has made me stop and think about some things in ways I probably would have never done, and that's cool. I feel like she has been a good influence on my life, and I hope maybe I have been a little on hers too.