It's an intentional (IMO) contrast between how she treats them like they're beneath her while also being, like, a needy pushover - the WN chapters go into this point in more detail, with Ruruna seeking out Yura in this chapter because she doesn't want to be alone during lunch break.
You could write a darker story with this concept about how Ruruna's upbringing has left her unable to relate to other people as equals or process feelings like affection, but given the tone of the story so far I think yuri will overcome all obstacles.