Nur ein Wort

Some more suggestions:

"It's crazy how you're so quiet" => "It's crazy how you're so wonderfully quiet"

"In awe, you tighten the ropes // It'd be silly if // Some girl fell over it in the night" => "You attach its ropes // And watch in silent bewilderment // When a girl trips over them at night". He fastens the ropes of the tent, and the he is struck speechless if a girl trips over them by night. This is a creative metaphor for "You meet the world with silence, and then you wonder how the more you remain silent/aloof, the more women are attracted to you".

"Zu deinen Füßen red' ich mich // Um Kopf und Kragen." => This metaphor means "I'm so in awe of you, and I tell you all about it, even though it's making me feel silly to be laying all my secrets open in the process."

"Ich will in deine tiefen Wasser // Große Wellen schlagen => This metaphor means "You're somebody who keeps his emotions a secret but I want to make you show them." (You pretty much nailed that with your footnote, I just wanted to make sure the meaning comes across.) Very much like what Alanis Morissette means when she sings "Must be strangely exciting to watch the stoic squirm" in "Uninvited".

BTW one of my favourite German language songs ever, simply because of such creative metaphors and combinations of idioms.