unfortunately that scene, although it is so important and is practically the closure of the first part of the story, does not always work.
it is fully consistent and credible only if Mc is involved with both girls and if he has the right affinity to see his proposal accepted
I try to explain myself:
1) if MC is only involved with one of the two girls everything they say is forced enough, for example if MC is only interested in Maya (and therefore does not stay with Josy to sleep after the date) it does not make sense to ask Josy to follow her heart and then eventually propose to be more than friends (a proposal that will rightly be rejected, but it shouldn't have been) at the limit Mc should have asked Maya to choose, and after Maya's refusal to accept to remain friends. but this situation is probably a problem for a very limited number of paths
2) supposing MC is involved with both girls, does it make sense that acceptance or rejection of his proposal is related to his affinity? the 2 girls like MC with that "affinity", but then that same affinity makes him unreliable and risky to continue a relationship.. (not considering that this affinity is determined by isolated gestures that have practically nothing to do with the two girls). there is a sort of moral judgment on MC, then strengthened by the fact that once his proposal is refused in many paths he will go to have sex with Jade, as if to show that the choice of the girls is correct
.. this is instead a problem that many more players encounter
3) after the MC proposal is rejected, the "let's be friends" safety net goes on. but it's a kind of armed truce that none of the 3 believes, both Josy and Maya question her at the first opportunity