Not much. These girls may have their own goals. If they work hard for their goals, they will not want to fall in love, or they may not meet the right person, or there are really few opposite sex around them, so they will not fall in love, but they cannot say that the opposite sex is not good. Some girls don't look easy to approach, so it's not easy to chase. Some girls are beautiful and think there are many boys chasing them, so few men dare to approach them.