When she mentioned she wasn't interested in dating, I would have said, "Not even, me?" and see where it went from there. I see it as a take it or leave it moment. If she was interested, she would have done something. If not, you would definitely know. And if she didn't, I would seriously back off and leave her be...
The only caution here is a lot of WAW/WW say this. My W would say this in her wayward phase. She'd even say, "Or maybe just meet someone for dinner, but no sex."
Remember, obstinate spouses RARELY say the truth. That is why you believe nothing they say. In fact, a lot of times you can believe the exact opposite of what they say. If they say "I am not interested in dating", you can rest assured that that is what they are interested in. In fact, a fried of mine I confided in during my sitch, who was once a WW herself, told me that she had no doubt my W wanted to sleep with other guys. One time I asked her "do you want to sleep with other guys?" and her answer was "I don't know". Which is WW code for yes. This after she told me what I quoted above.
I will repeat what I've told others based on another anti-D writer's (not MWD) words: Your W doesn't need to move out to find herself or work on the MR, she wants to move out to be able to sleep with other people.
M(53), W(54),D(19) M-23, T-25 Bomb Drop - Dec.23, 2017 Ring and Piecing since March 2018