I hate to say it, but the game as written is no fun to play. I don't like anyone. That's problematic to say the least, as there's no emotional investment. The MC is a pudgy, delusional dumb ass with no self respect or spine. He has no redeeming qualities, he's just there to be walked on. And then you throw that curve ball of a kitchen scene at us...
We should be playing as THAT guy (male best friend). It would make a lot more sense for him to want to throw a monkey wrench in Amanda's traveling/relationship plans. From a narrative/creative standpoint, think of all the doors a simple shift in character could open. Now as a player, we'd have more to do than party planning. We'd have to keep our affair a secret from both Amanda's boyfriend and our best friend.
There would be the backstory of how and why it happened, and Sadie could be there for more than the cliche of wanting her ex back. She could be there to to kill Ronnie's pipe dream and kill his friendship to us as she knows we're messing with Amanda. She could even try blackmailing us etc. This is a game I'd like to play.
Again, as written, Ronnie's wanting to get with Amanda comes off as nothing but wishful thinking on his part. If we can't take the MC seriously, how do you expect us to believe that Amanda would? And as psychotic as Sadie is, I don't see what she sees in him either...