Josy may still have feelings for mc, but not the other way around, not after not staying over at her place, after deciding to be just friends, after declaring that he had no feelings for any of the 2 girlfriends, and after confessing to her that he did not think about what their story might have been without Maya. From that moment on Josy is officially a stalker.
I dont know if you completely avoid Josy, you are still forced to spend some time with her or not.?! If so, then in the end it is simply exist for one simple reason, for this line for MC, to go back and stole the paper.
this is how simply dpc wrote the story, the same way as simply wanting to thank Bella for having said a good word to Jill, lead to a makeout session with her in the library in episode 3, which open the possibility to stay at her place.
there isn't really too much to it. of course if you are on Jill or Bella path, he will remember a conversation with them, at least on my Jill run he remembered what She told him.
the point is the Josy hangout scene play outs 99% the same way in every path, dialogue change if you are in a relationship, MC shoot her down. If you are on other path you can confess your feeling, and if you are on her path you have sex with her.
I think MC does not have a talk with Sage about Maya, that is why this exist for that case. or for the others path. MC need this encouragement and reminder, for whatever reason.
and I assume the same goes for Maya too, this is simply how the episode was designed by him.
You can mark this post, so I can tell you I told you so. 
