Ever since the mc had the talk with Maya and Josy and they rejected him, or he decided to go his own way, Josy has shown signs of regret/conflict.
If you follow Josy after she's caught up with her dad, she has a bit of a meltdown and tells the mc she wanted to choose both him and Maya but she was scared of losing both so she just went with what she thought Maya and the mc wanted.
It's interesting, but it seems she's actually afraid that Maya and the mc will end up together. The fact that Maya, a supposed lesbian, has fallen for the mc, makes Josy think the mc must be really special to Maya, and that scares her. What if they push her out?
The diary entry at the end of that scene is:
"I talked to Josy about her and Maya. I think she had more feelings for me than she let on before. Even so, she's with Maya now."
If, back in episode 5, you told Derek you had feelings for Josy, later in episode 7, if you choose to comfort Josy the night that Patrick arrives, she gets all awkward, and admits she still has feelings for the mc, but tells him she doesn't want to be a cheater again (that means she's acknowledging that she cheated on Maya with the mc).
The diary entry at the end of that scene is:
"I comforted Josy, and that made her emotional. She still has feelings for me."
I would hope, after all that, there is still a chance for the mc and Josy too. It most likely means heartbreak for Maya, but, what ya gonna do...