Your dh has found out (not about the snog) that you have been sending lots of emails and have been intimate on these emails - nothing sexual but lots of personal information.
You've managed to delete all the emails but he saw a couple of suspect texts which led him to find out about the emotional affair.
Your dh is obviously playing merry hell. He is shouting, screaming, has pushed you over onto the sofa and thrown a wine glass at you so that it smashes on your torso (clothed). Every evening is fraught now with arguments or icy silence. He says he cannot even look at you but isn't leaving you.
You want to save your marriage even though you think your dh drove you to this emotional affair by being distant and not wanting sex with you more than once a month. You realise you should have binned your dh before embarking on any such affair but now you want to try and make your marriage work.
Is the onus on you only, as the miscreant, to make things better? Are you mad to think that seeking marriage therapy at this early, angry stage is hopeless? Is it better to separate and then proceed with counselling together?