Could you maybe sleep downstairs or in another room. She is asking for space, try to give it to her.
If you have been clingy, suggesting she leave would be a 180 for sure but "suggesting" she do anything might sound like "telling" and feel like controlling. The controlling cliche you haven't had hurled at you yet I guess. LBSs in their panic can become controlling. Try to avoid doing or saying anything that can be perceived by your wife that way. IMHO, if she wants out that badly, she will decide for herself to go.
Get a new therapist if you can.
I know that sounds like a contradiction but a divorced, female, therapist talking up divorce is not likely to help your cause.
Me 44 She 46 S13 D9 M18 T23 3 years DB'ing Successfully busted