I hear you on the undecided part. May I suggest you keep her hanging on until you decide? If you feel you're detached enough to do it, meet her as a "touchpoint" every now and again. Lay the ground rules with her first.
E.g. A: Hi W, I'm going to be in your area in an hour/tomorrow. Let's grab a cup of coffee at XXXX." W: Sure. A: Cool. To be honest, I wasn't sure about meeting with you because I don't want you to get the wrong idea. W: What.. blah blah blah, whatever A: All I'm saying is that we need to be friends.
Well... I think you get the picture. NO R TALK, no coming home talk. She'll try point it to this, you deflect. "I'm not sure how I feel" or repeat your previous stance...
Guess that's about the best I've got to offer you for now.
M:11 | T:12 | Status: Married 4C's of WAS communication: Cool, Calm, Collected and CONFIDENT