A bit raw, but I understand it's a work in progress, so that's perfectly fine with me.

Some random thoughts from my side:
  • the mood of the melodies contradicts the lyrics, it doesn't sound happy at all. But maybe that's the way you guys want it.
  • I think repeating "Crazy, happy" a second time (with A G or A B G instead of G G as melody) would resolve the chorus better.
  • It's only half a bridge smile Rachel can come up with 2 more lines of lyrics in no time, I'm sure!

But I like what you 2 have put together so far, the song definitely has potential.