I cried for the first time in almost a year.
Why did you cry, because you need to stand up to your boss?
Yes, I'm going to say no to my boss.
If you are in a stressful situation, crying is a normal response. Sometimes it helps to cry to vent frustrations and feelings.
I'm just so nervous about this.
That's good. That means you are aware of your emotions. Now, all you need to do is express them in a healthy way.