LOL well he sure called you out, didn’t he? We all know you’re still going to text him, that’s why you announced you’re stopping and he ignored it, because it’s a fake ultimatum you’ve made. People don’t need to excuse themselves via texting, I mean sometimes I tell someone I’m about to be busy, but doesn’t everyone just assume the other person is doing other things and not sitting alone in their house cradling their phone, waiting for the next text? We all have busy lives, you’re being a high maintenance texting partner.
Why are our poking around an ex? Is he an ex for a good reason?
If you actually want to stop texting, be a grown up and stop. It is literally that simple.