At this point I'm for all 3 of them breaking up with their respective "flings" and just taking a break from romance in general. None of them can communicate clearly...
Natsume is oblivious to what her girlfriend wants, but that extends to even her friends. She doesn't and clearly can't understand that people don't have the same hobbies as her, have other wants and needs besides what she knows and makes no deep effort to truly understand anyone. She doesn't pry enough and ends up shoving it under the rug.
In turn Fuuko communicates very clearly what she wants if it's not so difficult to bring up and is incredibly blunt but can't talk about the obviously extremely difficult situations she faces specific to her... like the one where she currently finds herself in with her former psychopath of a lover. She gets shy at weird moments.
And Yuni in turn can talk about difficult topics rather easily but struggles on the simplest of things. Telling her girlfriend that she's not into sports is somehow incredibly difficult for her, saying no to anyone is somehow a huge issue... but listening to natsume and Fuukos deeper problems is suddenly ok and she does that well but can't find the mood to act on anything.
None of them should be with one-another in their current state of mind.