Just one example... I follow him on fb, not sure how I did it but left it as it was as she can't see so no hassle. Yesterday he posted photos of T's half birthday party and tagged her and it bothered me. He warned me what he'd done but I'd already seen the post and I shrugged it off as ok. Except it raised my insecurities. It's the happy family illusion that it implies while our relationship is a secret, it's my head telling me that maybe he would prefer to have his children all the time and he would consider going back to her to achieve that. It's my head convincing me that she's expecting him to try again. I didn't tell him this as I knew he would apologise and he doesn't need to be sorry.

Seeing that written down makes it feel pathetic