So point of all this? Timelines are important. Even if your SO doesn't want one, the day they are ready for one you should have a mental diary or written one of everything you've remembered.... 99.9% certain....
No longer together
"To be loyal to myself is to allow myself to grow and change, and challenge who I am and what I think."
Timelines, confessions, open journals get out what you remember with the option to add more if you remember more. It is a balm to get out the ugly and the toxic.