I knew this was Reylo coded early on.
Everything to me was reading as them just in a modern AU setting and I couldn't not stop seeing them or the rest of the book cast as various Star Wars characters just to find out that this did indeed did start off as SW fanfiction, so I feel validated 😄😂

Both MCs start on the wrong foot and are sort of unlikeable from the beginning which I enjoyed as it's a different set of pace but Ari comes off as a bisexual commitment-phobe yet oversexualized brat that is trying to adult while Josh is a rose colored glasses guy wanting easy love and not understanding why he's just not getting it with his surly and dramatic attitude. 
I definitely enjoyed the side characters, how they all managed to stay friends with Ari is questionable to me because of how she read on page.

 I think if I had read this as the original SW fanfiction, a lot of Ari and Josh would make a lot more sense because those back stories are already established and describe a lot about them but in this case, the author didn't go into depth to create it early on but rather over various time jumps redirected me, the reader, to gloss it over and see them at those given moments of time which can create the allusion of a character's growth or fallback.

That being said, whoever keeps promoting this as a gender bent 'When Harry Met Sally' needs to stop because it's not. The dialogue can be smart, ther 's a few good moments, and it's a nice homage but definitely not Ephron from what I read, that's my opinion.