Lies about working with another woman? Seriously? He works with a woman (don’t we all?) and you accuse him of lying because he didn’t tell you?
Do you honestly expect him to come home and admit to you that a woman has started working in his office?
And he didn’t lie to you about watching porn he just didn’t tell you,because it wasn’t relevant. It’s a red herring because you didn’t find he’d watched porn, you judged him based on the contents of his spam folder,which probably mirrors most spam folders the country over. Have you looked at yours to see what’s in it?
We get posters on here whose partners are this abusive and who threaten to commit suicide over the betrayal they feel because their partner has spoken to a man or angered them in some way. Actually thinking back I went out with one. Had been abused as a child, neglected and then left at boarding school for the parents never to return.
If I spoke to any of my male friends he would pull me aside and tel me how much it had hurt him,how he felt betrayed, he cried about it,rang me in tears because he’d seen me talking to someone and felt I shouldn’t.
Eventually he hit me during an argument,I slapped him back out of reflex and walked away from him forever. (BTW I was a teenager and he was a few years older than me.)
This is the kind of relationship your partner is in and you are the abuser.
Those are harsh words I know but if this was a man we were talking about,or if he posted as the victim you would get absolutely no sympathy here.
If you’re genuine about wanting to work through this then you need serious psychological help. But. You can’t expect him to toe the line in the meantime. If he ends the relationship then you will have only yourself to blame. He needs to protect himself.