My Green Bean Pod Withers

I mentioned in February that my green bean plant bears a flower which later became a fruit. The fruit (pod) has gradually withered. I plucked it and found only 2 green beans inside the pod. What a disappointment! I planted a green bean and now I have 2 green beans after about 3 months. This is surely a lousy deal!
Anyway, the experience to witness the life cycle of a green bean plant is enriching. My green bean plant does not seem to grow well anymore. Perhaps it is reaching The End.