You validate any chance you get. That and give it time....more time. Apart from that there is not much you can do that I see, but I'm no expert.
I am sorry for your lack of connection and that your W has reacted coldly.Reverse the situation and ask yourself how you wouldreact if you were her. I know people react differently but I bet you would react differently. I'll let the vets analyse this in more depth.
How has she been with other people re texting etc? As ye were together most of weekend perhaps no real need to message you.
You had thought out this for s long time and reflecting hard about your options before deciding what to do. OK it came out in an angry reaction instead of otherwise, but you said what YOU needed to say. Leaving it unsaid would have made it worse for you.
It is done now and can't be unsaid. You second guessing yourself is because you want to save M at all costs, but the R ye have is not what you want to keep. Either you/ye move towards a different better R or it is not something to settle for.
Hope I make sense as I am rushing here just to answanswer before I got to go.
R 25 years M 14 years S11 & S13 Working on it alone since Oct 2014 M in trouble a lot earlier (~2 years) Feb 2016. 1st R chat in a yr. Next R chat Aug'17 Still together