In this way Mr. Kwapis's latest film, "He's Just Not That Into You," though it boasts a marquee-busting roster of A-list Hollywood names including Jennifer Aniston and Ben Affleck, fits into his gentle niche. Based on the book of the same name by Greg Behrendt and Liz Tuccillo, which offers humorous counsel for women who waste their time with unresponsive men, the movie, written by Abby Kohn and Marc Silverstein ("Never Been Kissed"), is a romantic comedy about how hard it can be for the lovelorn to read others' true feelings accurately. The film, set to open Friday, follows nine stories of ill-timed attraction among a group of young urban professionals in Baltimore.