Dream about unable to talk is a metaphor for the sacrifices your have made and the difficulties you have endured. You are not utilizing your full potential. Someone is forcing their views on you. It indicates feelings of aggression or submission. Perhaps you are having difficulty accepting your flaws and imperfections.
Unable to talk dream is a sign for your feelings toward your girlfriend/boyfriend. You need to have patience and calmness or else you will risk isolating yourself. You are driving people away or turning them off. It is sadly a warning signal for trouble, loss and overwhelming grief. You feel that somebody is somehow disappointed in you and in the decisions you made.
If you dreamt about unable to talk:
Your partner (current or prospective) may be looking for more than the obvious rewards of being together. So perhaps it is time to cast your eyes around and see how you can spice up the partnership.