I agree with Morris.
Those of you mentioning "the script" . Has it occurred to you that the reason so many people ( Men AND women) say their marriage is over , we sleep in separate beds, my ex is an unstable nutter, is because it's TRUE? I totally get that it's not always true , but it often is.
Just look round mumsnet. It's full of people saying this, who are still stuck with their partners. No one says " i don't believe you, you are just following the script"
I know a couple VERY well ( in my close family) . She was the most vile toxic person towards her husband that I have ever met. Anyone who knew them thought the same. She was actually a decent enough person to everyone else but was a demanding bully to him. He tied himself in knots trying to make her happy , to no avail. They were very religious and he vowed to stick it out forever for their kids.
They had been married for about 16 years when he met someone else at work, also in a very unhappy marriage , and got the guts to leave. Ex wife went into overdrive and did her very best to alienate their children from their father. It was a terrible few years for the husband. he eventually divorced her and has been married to his second wife for 5 years and is incredibly happy. Ex wife still tries to stick the boot in wherever possible.
On mumsnet you will find overwhelming criticism of a situation where a man leaves his wife for another woman. In this real life example everyone who knew them thought "good on you. About time too "
it can and does work out.
OP, proceed with caution and good luck.