Should I initiate R talk?

[Arsene]

So now I'm out of a plan. I won't be initiating R talks or making any demands but I feel that after over a week in total darkness (except for a short text from her asking me when i thought I'd come back so she can make plans - to which I replied i didn't know yet, as courteously as possible) I need to do something.
I'm bound to bump into her as she is with D8 now so how do I behave? How do I answer her questions? (if any) In the past she has asked me a lot about my personal growth. If she does, should i tell her what i'm doing or should i just be vague. I know I should tell her about my 180s but what if she asks?

Should stay "dim" when she's around or become the friendly person I had been.
I've replayed a few of our last discussions and at one point i thought she got angry at me for prying into her life, or that she felt guilty (I told her that I didn't think we should bring OM/OW around D8 - at this time I'm not sure there is really an OM and there is not going to be an OW). At the time, her mood changed and she turned away, then I told her calmly, not to worry if there was someone else, that we were no longer together and that it wasn't like cheating. To this she answered angrily that she understood how things were.
I thought then that it was a sure sign that she was seeing someone but now, i'm wondering if she got angry because she thought I was the one with OP in the picture.
Now, after nearly a week of NC (which is a total 180 for me)I just wonder how to come back to earth. Should i dispel her fears if any? Or should I just stay mysterious and kind?
Any thoughts appreciated. I'm going back tomorrow and would like a bit of an idea for my road map.

Thanks all.