We all could , could n't we ? I just wished I had had so much fun too . Aussi , YC is leaving real real soon . When school started I thought I could ask her out somemore and hang out more and as I caught up in my own reverie , I lost track of time and now I have what , 22 days left till she flies of the Land Of Unknown .

Question with options to choose from: Why is the narrator a bit sad ?
Options are: -Their Aussi friend is leaving .; -Their school lab partner is leaving .; -Their best friend is leaving school .; -Their crush is leaving .;
Their crush is leaving .