I was super sad to see that Alex(andra) was abruptly greyed out after the encounter with her father... HOW DO I KEEP HER? Please, any hints would be nice; I don't necessarily need a walk-through.
They are usually only the ones that matter toward the girls and best ending. If it is not there, you can pick what you like, sometimes you may have to choose between one of two girls to get and extra heart, but they do not grey out the one you did not pick. (Ex: best food between Dalia's and Alex's).
Alex may seem tricky (that pen choice is very tricky 'cause we don't know her yet) Once you get her personality it may not be that hard to make the right choices. She does not like to be complimented for the sake of it, she is independent, she likes to be challenged/provoked (but remind her she can rely on you) Keep pushing to get to know her better! Remember to always stand up for the girls! Defend them, stay with them, don't leave 'em behind. They gotta love you and you only!