I am a regular poster, but seeing as I've never ever told anyone this, I've namechanged.
DH and I have been together for 10 years and married for nearly 8.
When we got married I worked for a smallish bank, in quite a close knit team. I'd had a really good friendship with one of the guys in our team, and around the time of my wedding, I was moved into a different team in a different office building. I was immediately struck by just how much I missed my 'friend' (let's call him T). One night, when out with my workmates, he and I got into a bit of a deeper conversation, and I confessed that I missed him, and he said he missed me too, and it was a bit like one of those lightbulb moments when you realise that the feelings of 'friendship' you'd had were actually something more. But I'd just got married. To someone else.
To put it into context, while I loved my DH very much (and still do), he and I both had jobs that required us to travel a lot, so we didn't spend that much time at home together, and (if I'm going to be completely honest), I was probably experiencing a bit of post-wedding anti-climax and was feeling as though at just 25, nothing was ever going to be fresh and different and exciting.
T & I started a bit of a strange on-off sort of an affair, lots of lunches and dinners out, lots of kissing, not much more (we spent one night together, once, but didn't have sex), he would date other women (he was single) but would come back saying how it wasn't the same because it wasn't me... really, although there was a definite, major physical connection, I really did feel as though he 'got' me more than anyone else, we were totally in tune with sense of humour, values, ambitions etc.
Anyway, it never went anywhere. I wasn't prepared to leave DH (and to be fair, T never asked me to) because I wasn't actually unhappy in my marriage, and I knew how much leaving would devastate DH and really upset the apple cart with my family, and everyone would hate me. And there was no guarantee of anything with T, he made it really clear that he didn't want me to leave DH 'for him', if I decided to leave then he wanted a relationship, but to start from scratch with one like a regular couple. So I stayed.
It finally all ended absolutely 100% for good with T when I got pregnant with my first baby. I felt (and I still feel) that cheating on DH as a mother would also mean cheating on my children, and I'm not prepared to do that.
So anyway, that was that. We moved away and I deliberately stopped all contact with all my old workmates so as not to put temptation in my way.
Then about 18 months ago, I was feeling really pretty flat and for some reason, decided to email T: not not not to start anything up again, I just wanted a bit of email flirting really, to feel like someone 'got' me. Turns out he's married now, really happy, new baby etc. I'm really pleased for him and to be honest, for a while it improved my marriage in that I no longer felt as though I had T as a safe bet, so had to put in more effort.
But although there's zero prospect of anything ever happening with him again (and let's be serious, I haven't even clapped eyes on him in 6 years), he keeps on cropping up in my dreams (again last night), and we're having a lovely time and it's very exciting.... and then I wake up.
Not really looking for advice, certainly not looking for judgement because I know I did a really wrong thing... just hoped that maybe by saying the unsayable I could get it all out of my subconscious.