Girls are naturally romantics at heart. Not all of them, but it does seem that most of them are. Girls want love. Therefore, if a boy is interested in her, she may end up dumping her friends in order to spend more time with her boyfriend. With some friends, this is understood and accepted.
However, in most cases, it can cause a rfit between the friends. The friends feel that they should share the friend’s time.
However, girls usually want romance and they will do anything to get that including giving up the time that they spend with their friends. Boys are sometimes like this also, so they are in the same boat and act the same way around their friends as well.