I feel like I have been in a similar situation, I haven't read your whole situation but from what I have read it seems more or less identical. An ex told me that she wanted a few weeks break to find out what she felt etc after starting a new job. I persisted and waited, every so often asking if it was time to get back together yet, looking back on it I was being quite a pussy, but I don't really mind as I think I liked her at the time. Anyway, to cut a long story short, she sort of said it we should probably break up but then kept saying it's not definitely over. It sort of went quiet for a few months and I got the message I suppose, then it started up again and was on/off for a few months. Then it went sour and has remained so since to be honest.
My advice is simply cut it off, which I know you probably wont do because the thought is still there that it might go back to normal. In my experience it defiantly didn't go back to normal and now it just leaves me with a bad taste.