"when she's being nice, opening up conversations, it's hard not to reply."
"Some small talk when she returned but I kept my distance"
I don't get why you're doing this. You know this isn't DBing. If you keep distancing yourself, your W will stop talking to you because she'll feel you're distant.
The point of detaching from your W isn't to shut her out. It's to emotionally disengage from the drama your W is currently in. You don't overly throw yourself into everything she says. You keep things friendly. If she is actively coming towards you, increase the positive interaction. If she backs off, then you back off.
M-43 W-40 2D - 9 and 5
Emotion, yet peace. Ignorance, yet knowledge. Passion, yet serenity. Chaos, yet harmony. Death, yet a new life.