So I was reading this topic and I was surprised that there was actually SOME substance to it.
A lot of descriptions I thought really sounded like me, like the person eating lunch by herself (I eat alone everyday =P)
But also the fact that I really am a sensitive and caring person. I guess on the outside I don't come across this way. My roommate never says anything personal to me... I guess a lot of people feel like I won't care. That's wrong though, because I will listen and try to help solve your problem/give advice. When I said to my roommate "My cat is having surgery" she just goes "Oh" (she's an INFJ). If she said that to me I would have helped talk her through it.
I've come to realize that most personality types, especially F's since there are SO many of them here in my all women's school, just don't get me. Don't know when I'm sarcastic, get angry because I'm not always politically correct, etc.
Anyways that's really off topic.
If you're interested in an INTJ girl just tell her. I know I really prefer straight-forwardness. The best thing to do is become her friend first. Show that you (most importantly) understand her sense of humor, and I think then she will feel more comfortable around you and see a deeper meaning to the relationship. To clarify, don't try to befriend her and secretly like her, we can totally see through that (or at least that you're not being totally genuine) and for me it would be enraging. Just freaking tell us what your intentions are. Don't be scared.
Any questions, just ask.