Thanks for all your messages - I missed the last few as I hadn't logged on in a while. Well a lot has happened since I posted this - I ended up confronting him about it as I was bottling up so much suspicion I just blurted everything out. He was denying anything was going on until I showed him the note which apparently he hadn't even seen in his notebook - he looked quite shocked when he read the contents and said it was wrong and agreed their 'friendship' had overstepped the mark. Apparently, the reference to 'Bertje' is someone at their workplace who my husband really doesn't like, so it was an in-joke between them. He admitted that their friendship had become a bit flirtatious, and that he found it fun and frivolous, that is the only thing he has said about it - he has denied anything else was going on. He said he also met her once last year for a drink together after work, apparently to talk about an issue she had with work and that their friendship had been developing over coffee they were having together 2-3 times a week at work. After I confronted him, he admitted it was wrong how far it had gone (though he maintains nothing physical has happened).
The next day, my husband said he had a meeting with her and told her that I had found the note and accused them of having an affair - apparently she was mortified and really embarrassed about it, and that they have stopped meeting each other. My worry however now is a) if they really have stopped meeting b)whether it has pushed them together more as it's been brought out in the open now.
This incident really made me think a lot about our marriage and after the initial anger I made a big change to get closer to him (I realised I pushed him away years ago and had to take some responsibility for this), we have slept together a few times now (more than we have in the last year!) and things have seemed a lot better, I think he was struggling with the lack of intimacy.
However, even though we have both made a concerted effort to be more together and even talked about trying marriage counselling - every few days I'm plagued with doubts, if this is all a cover up. This morning he left for work earlier than usual and I called/texted him when he should have got there but he didn't pick up or answer my messages for over an hour - and when he finally spoke to me I was really angry and accused him of meeting this woman.
I don't know how I can move forward when I know he is seeing her every day at work.... I have seriously thought about emailing her husband with my suspicions as he is in the same workplace but I don't want to make things really difficult at work for my husband, he said it's already awkward since all this has happened. My husband also was VERY against me mentioning it to the other man saying it could jeapordise his/her job. I can't stand the thought of being lied to though and I just don't trust my husband 100% to tell me the truth. I feel that if she is pursuing him, he wouldn't have the willpower to say no.