Oh darling how horrendous for you, and yes your life has changed forever. Wether you choose to believe him or not, nothing will ever be the same. 10 little words .... do not believe a wordthat comes out his mouth!!!
Before you start digging further you need to think wether you actually want to know the real truth. You know deep down the truth! Everyone on this thread does. But do you want to know??
Because believe me it's not so much the affair that hurts, it's the lies and feeling like a stupid naive fool. This is going to be one of the worst journeys of you and your children's lives and I understand why so many woman choose to "believe".
There is no advice I can give but just get through each day, it's been 2 years since I saw just one message and opened up the biggest can of worms and I still cry regularly. This is not the life I imagined I'd have at 50. But rather this that be with a treacherous cheating bastard!
So if you want to believe him, stop searching if you want to know the truth ask for bank statements and phone bills! He'll double bluff you and make you feel like a paranoid fool, well he's already doing that "you'll blow the messages up out of proportion".
Have a long think what you really want, the truth or the life you have now. You can't have both. I'm so sorry, I feel sick for you.