He has a problem. I just see him as someone who has issues and he can't help but get involved with someone else a week after we had called it a day. Also, like you, one night after he had been gone for over an hour (!) and I realised I was waiting up for him, I went to bed and turned off the lights.
I also told him that he was not to text if we were having some scheduled time together (eg if we need to talk about something) as that was my time.
We are going on holiday next week together too, and I told him that I couldn't face him texting her all the time (and I mean once every five minutes) as it was my holiday too, so we've agreed that he will text her but not in front of me. In return I will 'let' him call her for 30 mins once the children are in bed.
Me:36 M:16 D final: 08/09 Ds:10&5 Ss:8&3 Bomb 3xPA 200 sexual encounters 15/06/08