My estranged spouse is going away soon

Since last week, she's been staying someplace else and will be going back to California at the end of the month. It was only to spend Christmas and New Years with her family, at first, but this time, she's staying there. Maybe for just a few weeks, maybe for good. I'm not going to get too much into what happened. Most who are aware of my marriage from my posts already know I've been unhappy for some time. I'll just say she did something that's made things irreconcilable this time, to where her and I need to finally face the reality that we just can't be together anymore. She didn't like it and wants us to stay together. I settled for a compromise of taking a long break, at least, with her going back to California to be with her family for a while. My hope is she'll find that she's actually happier there and agree that it's best if she just stays there. We'll see what happens. Right now, I'm pretty set on ending things between us for good this time, but who knows? Maybe I'll end up really missing her and wanting her back. That's happened before. But even if she does finally take therapy for her issues, like I've been wanting her to for a long time, I'm thinking it's too late now. I don't see how things can be salvaged between us.