In my opinion, it's not the doubt that causes problems. I think is the lack of courage , or sensitivity, or care to communicate how we feel that creates problems. Doubt in itself is a good thing. It comes to strengthen our trust. And to arrive to the truth. However, One mustnt doubt just to doubt. If One doubts, let that be to arrive to the truth.
Nice poem Meena! Doubts indeed can lead to breaking bonds but sometimes telling the truth could hurt the ones closes to you and may change them from who they are. Secret is like an anchor, the more you hold on, the more it gets deeper and heavier.