How to Let Go: Learning To Deal with Loss

I have become a huge fan of this Mark Manson bloke since seeing a linked article by him about a year ago.
The more of his stuff I read the more sense he makes.
I am presently reading his book "The Subtle Art of Not Giving a Fuck".
He is an absolute gun.

The "drama" is oftentimes the only aspect of the ILIASM shithole that involves "passion".
Negative passion to be sure, but at least some form of passion.
And often, the only emotional connection left in an ILIASM deal is negative passion.
And that has to be fed by ongoing and/or new "drama".

This weird kabuki dance of one pursuing engagement and the other rejecting it becomes what the relationship is based on.
That's its' raison d'être, the prime reason for the relationship to continue.

Both spouses know their role - and each others role - and there is some form of connection in the dance.

But the bonding agent - "drama" - is not unique to refusers.
You don't have to look far into the stories here to see refused spouse's engaging in it too.

The "pursuit and rejection dance" requires two participants.

And if you didn't have the "drama" holding you together, what would actually be left - if anything - as far as passion goes ?

I find it similar to "free trade" between nations.

Every nation can do everything they need; self-sustaining. They are independent, but by free trade, we can rely on each others relative strengths and both of us work less hard to gain more prosperity.

You don't need a partner, but you're better off with one. 
Monogamous marriage makes you dependent, though, and a bad "trade partner" can make you a colony, a vassal state, a puppet governor with no actual sovereignty. Divorce could be likened to civil war. Some divorcees will find that analogy exceptionally apt.