Sentence 1: Brianna was at the prom with her boyfriend. 
 Sentence 3: Instead she couldn't find him 
 Sentence 4:  Little did she know they were crossing paths all night 
 Sentence 5:  They kept missing each other until the end of the night 
 Option 1: The two spent the entire night dancing. 
 Option 2: The two were supposed to be dancing right then.