I've been bullied all of my highschool life - I came in half way during the first year after friendship groups had already been made, and we had moved there just then so I didn't know anyone from the previous school, either.
I think I had a very INFJ reaction to bullying. Because of bullying I sank a little into depression, but it didn't seem to work - although passive-aggressive I've never been one to take shit and start to believe it. But it did make me want to constantly evaluate myself and every day on the way to school I would 'renew' myself by creating a new "me" - it's kind of difficult to understand, perhaps another INFJ will get what I'm talking about.
The more bullied I got, the more I felt inadequate and had to do this, compulsively. I also started withdrawing more into myself and even at a young age at about twelve or thirteen I saw it as a "shell" or "shield", and imagined it around me, strengthening each time I took what I considered to be a "blow" (even though I've never been physically bullied, it's always been verbal because all the bullies I've ever encountered were wimps... =P) and it would get tougher and tougher with each one.
Over time I am still one of the most hated people in the year, I have never had more than two or three friends, we've banded together and managed to stick it out. I am now very tough towards bullying, and put on my perfect "shield" which unfortunately makes me unsociable and cold towards any stranger because I don't trust them any more.
I know other people get severely under-confident from bullying and just can't take it - for me, it only made me stronger. I do regret not at least experiencing what a happy, confident, popular life would be like at school (I would probably have made more academic progress with that too) but I think it was a good experience all the same for making me stronger.
I wonder if this is just my personal way of dealing with it but it seems very INFJ-ish to me.
Also - my best friend deals with it in a very opposite manner - I tend to try and use irony and wit against bullies or else just completely ignore them, perhaps making them feel uncomfortable by showing they do not scare or intimidate me. She on the other hand gets aggressive and confused, and they know they'll get a good reaction out of her, so she gets much more hassle than I do.