I bought this plant two weeks ago... looks like the leaves are browning a falling off. Such a pretty thing, I don't know if I'm overwatering it by giving it water once a week... why is it dying?!?
I find the best way to tell if you are overwatering an indoor plant (or outdoors in some cases) is to weigh the pot in your hands.
If it's heavy, it doesn't need watering, if it's light, it does.
You get to instinctively "feel" by the weight of your plant whether it needs a top up or not.
Hope this is helpful.