There's a girl I like, and on her Facebook profile, she describes herself as an ISTJ. Here's a little description of an ISTJ:
The ISTJ is not naturally in tune with their own feelings and the feelings of others. They may have difficulty picking up on emotional needs immediately, as they are presented. Being perfectionists themselves, they have a tendency to take other people's efforts for granted, like they take their own efforts for granted. They need to remember to pat people on the back once in a while. ISTJs are likely to be uncomfortable expressing affection and emotion to others. However, their strong sense of duty and the ability to see what needs to be done in any situation usually allows them to overcome their natural reservations, and they are usually quite supporting and caring individuals with the people that they love. Once the ISTJ realizes the emotional needs of those who are close to them, they put forth effort to meet those needs.

http://www.personalitypage.com/ISTJ.html
So is there a special way to approach an ISTJ?