After a drunken hookup at a work party, an ad-exec realizes that he is in love with his “work wife.” He must decide whether to profess his feelings or keep their relationship as is before she moves out of state with her boyfriend.

1.
"what complication shows up as a result of his confession" might lead you somewhere,
since most audience wouldn't be satisfied if "he didn't confess" and "she leaves" (also the film will get over)
no one would sit an hour & a half, waiting for him to decide. Decisions cannot be Goal

2.
"drunken hookup" is an event but maybe not the Inciting event...Why? Currently it reads as:
"after falling in love with his work wife over a party, a man must confess or lose her forever..." (which is logical, how else would she know?)

3.
"to confess" is a short-lived action which cannot sustain an entire feature length film

Focus on what's stopping him from confessing -- Is she married (unhappily) to the brother, whom he owes his entire upbringing?
Or she can't marry him for some other reason? Maybe she's an alien sent to retrieve a human specimen, but she can't since she fell in love too

Conclusion:
In romance (genre) focus on the forces keeping them apart...

Good luck mrtz17!!