Breaking Up Is Hard to Do.

As Pink's "tongue in cheek".... or "TNT in cheek".... song below so clearly illustrates, the biggest danger in leaving a relationship is not the time when you say, "It's over".
It's the time you actually leave.
That's when things get really, really bad.
The person who is left, was not happy when you said you were going to leave.
Yet until you are out that door, they don't realize it is true.
That's when the trouble begins.
The "leavee" will seek justice, or retaliation.... in one form or another against the "leavor".
In my life experience, despite what media says, I have never seen an "amicable divorce."
Any break-up, of marriages, friendships, business alliances.... leaves one party feeling broken.
Particularly the one who felt like he/she has been kicked to the curb.
P.I.'s, like cops, find Domestics the most dangerous, distasteful and disturbing of cases...
I think Pink's video gives you a good idea why.