DB, How did he tell you? Was it a phone coversation or email? You haven't replied have you?
You are right to be cautious. But I think this is an important opportunity. My feeling is you can't go running back into his arms.. not straight away. You need to keep your composure.
I feel out of my depth...
My suggesting is to post a new thread in Newcomers to get some attention (I know it didn't work last time!!!).
make sure you put a link to your old thread in it.