Three days ago I (33m) left my wife (30f) without any notice, today I found out she has passed away from an overdose linked to cocaine and fentanyl.

Three days ago I (33m) made the hardest choice I've ever made and walked away from my marriage without saying anything to my wife (30f).
She was a serial cheater and had been manipulating me to be her doormat. I finally stood up to her abuse and packed and left while she was out with another man without saying anything.
Today I received a call from the police that my wife has passed away from a suspected cocaine/fentanyl overdose, which i had to identify the body. I'm now trying to pick up the pieces of what has happened and have found very little support or comfort in the last hours. Regardless if I left my wife I still feel more than devastated and realized that I loved her as a person more than I ever knew but wasn't able to stand her behaviour to me.
Am I wrong to feel guilty and some responsibility too what has happened to her. I was completely unaware of any drug use by her and will have to wait multiple weeks for a toxicology report to find out the real cause of death and what her usage was actually like.
TL;dr I (33m) left my wife (30f) three days ago due to her constant cheating, only to be informed of her passing by drug overdose three days later. I can't help but feel so much guilt for causing her to react the way she has which has cost her life.


Source.

Nobody just up and ODs on those drugs just out of the blue....it's not the first time she's used them.
It's a terrible situation, but you have no idea if she ODed because you left....it could've been while partying with whatever man wh0re she was running around on you with.
That being said, it probably would have been a better idea to man up and tell her you were leaving.
Nothing you can do about it now though. Just remember, you didn't give her the drugs, she do that all on her own.

Of course, all of this is assuming this is true....3 days and you're already on the internet talking about it?

Here we go with 3 days ago again. You were a coward...you didn't "stand up" to her. You packed while she was away. A MAN woulda talked to her, argued with her, and either settled it or at that point agree to seperate.

This is the second time I've seen this in the past 2 days...wtf does it mean? Is it like...I love you, BUT....