Capricorns hate conflict, and certainly don't want to seem overly sensitive and dramatic.
Thus, they end up not saying anything or making up little twists on the truth to keep things in control. Well, this could really work against your progress, Cap.
First, people will inevitably catch on. Others can sense when your emotions and actions seem out of sync. This can lead to discomfort or even disapproval - the things you're trying to avoid in the first place.
Second, what you think is best really isn't if it's not open, honest, and honorable. Keep your integrity and respect in tact by avoiding lies and burying the truth at all costs.