I really can't decide. Either INFP or INFJ.
My INFJ friend reminds me of Joan of Arc. Then again, this friend of mine might just be an INFP. also not quite sure. She is inspiring and driven to carry out her goals and passions. However, she also gets unbalanced at the drop of a hat and burns out completely. I am then there to pick up the pieces when she has her nervous breakdowns. It's kind of inspiring but kind of annoying too. Particularly when, as she's doing right now, she starts being paranoid and secretive and telling me there's so much I can't understand about her life. I know where it's going and I know I'm going to be one of the few who gets to bail her out when everything falls apart.
Sorry, a bit OT.