Better communication with ex now we have decided to separate

[YourOchreSloth]

To cut a long story short, I called time on my nearly 19 year marriage (23 years together) on Sunday. So very early days. The tears keep coming, I feel emotionally drained but have had some moments where I feel ok.
What I've noticed is that myself and my ex have all of a sudden starting communicating better than ever! When he speaks I don't zone out and it almost feels like we are enjoying each other's company. We are having a laugh etc. Whilst this is helping to a certain extent (with 2 teenagers we want to keep things amicable) it is also confusing me and feeding the tiny niggle of is this definitely what I want.
How can I understand this better. Does anyone have experience of this? What helped with boundaries? I don't want to mix us both us. Thank you.

It'll be the relief. This happened to my ex and I and then we changed our minds and decided to give it another go a week after saying we should separate. A year later and things were awful again and we've now fully separated and it's definitely not as amicable as it would have been if we'd gone through with it the first time

I have found this too. It comes in waves for us, but there have definitely been times since we decided to definitely separate when we have communicated better than at any other time we have known each other. I have had doubts but not enough to pause the separation. However, there have also been enough bad times in amongst the good to remind me why we're separating in the first place. And I just know that given a little while we would end up back here again, but it would be even harder to start the separation from scratch.
Try not to doubt yourself too much. Do you have a physical list of reasons you are splitting or moments that have been too awful to tolerate? For me, I a handwritten list and have found that useful to remind me of all the bad stuff when I wobble.