You did the right thing in passing on that shot. 37 yards with a x-bow is pretty long to begin with, and quartering-to shots are very iffy. I once took a quartering-to shot with a x-bow, but the buck was 7 yards away, not 37. I was fortunate that I cleanly took that deer (it fell within sight). It is best to wait for a broadside shot or a quartering-away shot, regardless of distance.