how can "desperate" and "crazy" be different/the same?

Answer 1

well, definitions used for desperate are
1 a: having lost hope
2 moved by despair
3: suffering extreme need or anxiety
4: involving extreme danger or possible disaster
5: of extreme intensity
and for crazy
1 a: full of cracks or flaws : unsound
2 a: mad, insane b (1): impractical (2): erratic c: being out of the ordinary : unusual
3 a: distracted with desire or excitement b: absurdly fond : infatuated c: passionately preoccupied : obsessed

so i think feeling desparate can cause you to feel and act crazy, and that feeling crazy can cause you to feel and act desperate