Of course it’s not your fault! But oh @Gnarly999 I’m so sorry, this man is lying to you—he’s not 50/50. He’s 95% out, and the remaining 5% is just him biding his time until he can leave. He sounds utterly, utterly miserable, angry, and resentful, and at this point, it seems like he actually hates you. He’s not coming back. He’s simply stalling until he’s ready to go.
I’d assume he’s using this time to get his ducks in a row. He doesn’t want to move in with his mother, who would harangue him for ending his marriage, so he’s probably found a rental property and is waiting for it to become available. Or he’s waiting for the OW to be ready for him.
He’s also emotionally and physically distancing himself so that when he does leave, he won’t look back. After his first wobble when he first said he was leaving, he likely realised he needed to be better prepared before making the break.
Is this Asia trip is a big deal for him? I assume he doesn’t want home drama interfering. He’s waiting until it’s over so he can focus fully on leaving.
The saying ‘If you love someone, let them go’ holds very true. But I completely understand that you don’t want to be the one to officially end it. Even if you don’t say the words though, you need to start accepting that it’s over in your head and your heart. Right now, faking it until you make it might be your best bet. Ask yourself: What would I be doing on a daily, weekly, or even hourly basis if I were single? And then—do it. This includes protecting yourself financially. Have you dug out all his paperwork? God knows what surprises you might find in there.
Today, make plans to go out this week, like @SabreToothTigerLilly suggested, arrange for his mum to babysit maybe even over night, so word gets back to him.Ideally, go out with people he doesn’t know. Join Meetup or find a club where you can meet new people. And while you’re out—and for a few hours before and after—block him. Make him wonder what you’re up to. Although be prepared that he probably won’t care.
This week, do not contact him. If he contacts you, wait at least 5 or 6 hours to respond—longer if it’s nighttime in his time zone. Go full grey rock. Make him wait for you.
Or, if you’re feeling really brave, block him entirely. Only unblock him if you need to contact him.
I’m so sorry, OP. This is painful. Sending you strength.