Like the "Career Girl" who is addicted to success in her job, the "Boyfriend Girl" is addicted to having a boyfriend.
This girl usually overestimates the time she is single, often making flimsy excuses as to why it was necessary to enter a new relationship so early.
Usually, quickly after entering a new relationship, the Boyfriend Girl publically displays proof of her relationship by changing her status as "in a relationship" and/or posting "Myspace Style" photo(s) of herself and the new boyfriend making out.
Most boys who come in contact with the boyfriend girl are prospective boyfriends. Essentially, the Boyfriend Girl is a slut without the sexual acts.
*two days later*
Boyfriend Girl : Hey, you guys, this is Mark, we're going out.