Try not to hear anything he says, because it is complete rubbish, especially when you add some chemical distortion to his already dark personality.
You sound a complete sweetheart and I'm sure that you will feel so much better, very soon. Let him say what he likes. He will want validation from all around him that this split isn't his responsibility - that he isn't unviable as a husband and dad and has left you all - but rather that you, personally, have made the marriage untenable. (By doing what? Everything he says? Not going out? Being there for everyone? Having your (plural) kids?? ... just pure nonsense.)
It will be particularly important to him that people who might be presumed to be inclined to be on your side - such as your mum - will instead say that yes, he is right - that he isn't bad - that it's all your fault.
TBH let the daft bugger say whatever he wants and needs to. The main thing is, it doesn't matter what he says, and you are going to be free of him. The main thing is setting up your independence, away from him. Hopefully he'll go on a long trip to Thailand or some such. You could even encourage him to go away for a while. Get your mum to suggest it. To say he deserves a break and really should get away and clear his head, and of course she understands him (yeah).
Just be glad, so glad, that he's gone. Hope he really has. Don't let him back. You don't need him. You'll be fine. Really you will. xxxx
And you only don't have lots of girly friends to come round because of him. They'll soon reappear, now he's gone. xxxx