Thunder and Shocked thanks for the replies.
At BD I was sure that H was having an EA with my ex training partner/married (ex) friend who also over the 12 months before BD became his training partner. I knew that they were developing an emotional connection as he disconnected with me but he has always adamantly denied it saying 'we were just friends'.
So he was here around 4 hours, before he came he spoke to S26 and got him to promise not to show me the text, which by that time he already had, so I didn't let on I had seen it. The text read like he was very emotionally involved with this women, it wished her a safe journey from her travels and asked that she let him know she had arrived safely it also said 'will catch you tonight for our goodnight beautiful, Love you' H admitted to seeing someone but, as he thinks that I haven't seen the text, said it was just casual and they had only ever met in a group with the rest of the fitness group. After reading the text this is obviously a lie but I didn't call him on it.
We had a really good talk and he finally admitted that he had been having an EA affair with the training partner at BD and that the feelings were reciprocated by her. He also admitted that they still talk 'occasionally' on the phone. I know that I am assuming here but I think that this EA (maybe physical?) is still ongoing and this is who the text was to. She is married to a man 17 years older than her, my H is 15 years older, and has two teenage boys, her H is seriously loaded and I think she is mercenary enough not to leave him, he bank rolls her hobby/business. I also know that flirting and reeling men in is a sort of hobby for her, she can't seem to help herself! so she could be doing this with half a dozen men!
All in all I feel that the gas lighting is over, I knew all along who he was seeing and this confirmation, even if she may not the current women, actually feels like a weight has been lifted off me.
I feel that I conducted myself with dignity and poise, I was calm and even got in a few truth darts. I also think that at the end of the day I am definitely be the better option, lets hope that I am still standing when/if he comes out of this.
Will update my thread with our conversation, which was enlightening, in the morning. Thanks for the advice. x