Should I run after him or just lt it be?

We broke up 6 months ago and I contacted him about his post as we were together for 4 years and lived together for 2. I asked him nicely to change his post. He is away in France so I asked him by e-mail. He mailed me back and phoned me but I was afraid to speak to him so he just left a message. We had a few mails going to and fro over the weekend. He used the words babe and hun (we use use them lovingly to each other at one time) I also used them. He needed some work advice which I gave him. He mailed me back yesterday and said thanks. .. I just mailed back no problem And that was it. I've heard nothing else.. My head is all over the place now and I don't know what to think.. Should I just let it be.. is he feeling anything.. I thought I was over him until I got these e-mails