OK this is a bit harrowing and maybe I am just paranoid. DH seems to be receiving and sending lots of texts to a colleague of his. OK I have been a bit of a snoop, and read some old emails after I saw some text from this colleague, saying she was lonely, and another one arranging to meet at lunch time. The emails seem as if they are very familiar with each other, and there was a period about 6 months ago, with lots of x's at the end of the emails and some love.
Ok, I am scared to confront him, and find out that he wants her and not me, also I have male colleagues who I am friendly with, but I certainly will not be signing with an x when sending an email.