You know Lucie, if you're feeling a certain way about anything (not just this guilt) then constantly trying to feel better about - or escape it, just doesn't work in my opinion... and you could analyse it, into tiny little pieces and not neccessarily solve it or 'heal' it... You could try and just let it sit with you and get on with the rest of your life. I've had a couple of close calls (on their part, not mine) with married men 'testing the waters' - to me it's really easy and clear cut - if he is ready, willing and able to cheat on his wife with seemingly no qualms - then he would more than likely do the same to me (or in this case you).
If you are desperately worried about ending up alone, then I can see why you would want to escape into an idealised picture of the future..."It's his wife's fault..", "He loves me not her...", "I'm the right woman for him, not her...." etc... etc.. etc... anything that will asuage the otherwise persistent negative thoughts you may be having about relationships.
If you're worried about it happening again, just tread warily and be honest with yourself - do you have your suspicions, but are turning a blind eye to them so that you can enjoy yourself for a while? And don't forget to ask: "Hey, are you married?"- and be extremely alert to the response.....
