How would you feel if faced with
1. Background of everything that's happened to lead up to this - Drew is bound to feel somewhat responsible for Aria being taken, he's been fighting his attraction for a long time, he's fighting his professional role, he's not convinced the boys are mature enough etc etc
2. He's been in the army since he was 16 and is used to being given orders by men in charge.
3. Henley is a massive worldwide superstar. Think someone like, I don't know (showing my age) the likes of Tom Cruise, Harrison Ford, Sean Connery, in they heyday. Maybe a more up to day comparison might be Brad Pitt, Jason Mamosa, Chris Hemsworth, We might think we can face them down but could we really?