I have an INFP friend and though I really like her as a person she is quite a bad friend for the simple reason that she is very selfish. I am wondering if that is related to her having Fi as a dominant function and her using it in an unhealthy way.
I'll try to put her behaviour into words. My friend often goes by how she feels about things on the inside, for example if she feels like she needs to be around people she will be happy to spend time with you, if she wants her own space she will make it clear to you and not spend time with you even if you as a friend might need her company. I in contrast would spend time with a friend in need whatever my mood is simply because this person is my friend and I believe in sometimes sacrificing your own needs for someone else. My friend doesn't seem to get the concept of sacrifice at all, her own wellbeing and "inner feeling compass" determine how she acts, other people's feelings don't really become part of the equation.
She also doesn't seem to get simple rules of friendship that are to me clear as day. For example I broke my foot last year and had to spend a lot of time at home and though I told her about my accident via email pretty soon and she lived just twenty minutes walk from my flat it didn't occur to her at all to pay me a visit during these weeks. I know that if my good friend had an accident and was homebound I would be over there in a flash to cheer her up. And I think it's much to easy to blame it on me being an extroverted feeler and her being an introverted feeler, I do think a lot of IxFPs would visit a sick person too, is her use of Fi just very unhealthy? (And no, her behaviour has nothing to do with her not liking me or trying to avoid me, the simple self-sacrificial rules of friendship just don't seem to occur to her.) She is also the kind of person that I wouldn't ask for help if I really needed it because I would be too scared that she "just wouldn't feel like helping me", hiding that sentiment rather badly underneath a thin coat of superficial empathy to quieten her conscience.
Any thoughts on that? (And if anyone wonders (since I am an INFJ) I haven't doorslammed her yet (she probably wouldn't even notice since I haven't heard from her since I moved away from my home country seven months ago and I am just tired of always making the first step), she used to be one of my best friends at high school so I am more cautious about just cutting every contact completely off but she is working her way straight into the "I just couldn't be arsed to spend any more time and effort on you, you are invisible to me." INFJ zone)