Thanks, dirt and Sally. It's really helpful to know I'm not alone (SO glad I found PC!).

Sally - I like your suggestion of making it about my marriage and the difference between an affair and seeing T (it's bizarre how I've blurred those lines).

I've been trying to space my appointments out more to try and deal with my stress on my own, but it's been difficult. And although my T is wonderful in many ways, I sense that he is uncomfortable discussing my feelings (which is understandable - he's human!) - but his discomfort makes it tougher for me to discuss the issue.