Yes! So true, at least IME (with males). I remember once at the beginning of the relationship when we were supposed to meet and he wasn't there, my Inferior Fi believed it was being stood up. Turns out on his walk over he got into a fight and spent the night in jail. Rather than being put off or judgemental about that, I was so relieved LOL. I think that's where inter-quadra understanding becomes apparent--the important thing to both of us was that we wanted, but couldn't, be together for reasons beyond our control.
He said that after awhile with me, such crazy drama ceased to happen in his life. I would talk Ni to him in the course of describing my own daily stuff, which he eventually started to absorb by osmosis. At that time I didn't know about Socionics, so I am applying the theory after the fact. Similarly, I would experience an appreciation for things in his day-by-day and in-the-moment fashion. He would send me texts "notice the beautiful sun today baby...it shines for us" (with tons of smilies and kisses).
With respect to your LIE friend saying you are too weak and timid, my guess is that they are trying to protect you from spreading yourself too thin. My EII friend does so much for so many people. However, I would imagine with Leading Fi, you know exactly who you want to do things for and why. I am not such a good judge of people, and whenever I open up, people tend to start asking so much of me when I've got 5x as much stuff on my plate, which leads to resentment and then I withdraw or try to keep people at a distance. My EII bud definitely notices this and steps in the middle for me. Last time he visited he cleaned out my car and carved me some shot glasses and fixed a bunch of things around the house...finally I had to step in "stop working you are here for a vacation!!". We both go overboard trying to protect one another from the big bad world