We don't have to have the romances be defined between partners, but can switch it up if you'd like.
In regards to how we can start the romance plot my vote goes toward one of the following:
1. one of the guys is injured by one of the girls (first choice probably Ali and Ember because of the current situation they're in) and taken in by the girls. As they argue about what to do next they find out the others are also in town and either use the boy's state as a reason to delay return or convince them some other way to give them a little time.
2. A variety of obstacles pop up on the way back which gives them more time together.
Alright, I think that covers everything (if I missed something just let me know). Feel free to voice your choice for plot direction. If needed we can pick one at random from what's thrown out, but I think it'll be better to go with what majority wants either way.