I think the context (and the followup) is important in this scene -- Maya doesn't feel as comfortable with Josy not because these two don't work, but she feels guilty about feeling comfortable with a girl because of Patrick's abuse regarding her orientation.They just don't work.
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I don't think "Maya treat Josy like shit"; they simply different and can't work together long. People can fall for each other, but when they starting to know each other better - to understand they just don't fit.