Then there is melodrama:
"Sister pissed me off! I am going to punch her in the neck. The Wh$%e." ~ My best friend, today (while driving).
She was only mildly annoyed.
I agree with Kit. Imagine how things happen between yourself and friends and then write that. It doesn't need to have an angry boil to be compelling.
Just real.
I think (and hope) there is a big giant middle ground between the extremes of Happy and Sad .
I would settle for the middle ground ~anytime~ (I would happily take meds to live in the middle ground).
I think the middle-ground is the base.
.