In the excerpt that has been given here, the author talks about the romance, the love, the looks that the lovers have on their face when they look at the person whom they love.
The author says that and compares the face of a lover with the face of a woman who is sweet and whose face is radiant with love. He also talks about looking into each others eyes and finding love for each other.
The courage Drew had to work up is internal. If it were external, something outside of Drew would change. In this situation, his courage is purely in his brain, so internal.
