OP your life is far from over.
I'd venture to say that once you get over the shock and are more used to it being just you and your DC, you will wonder why the hell you put up with his shit for so long !
Yes, it's a huge shift from what you've become used to , but you have actually become to used to being abused emotionally, that you've forgotten how it feels to feel good about yourself !
You have always been you, but he's kept you beneath his shadow with his wants/needs for so long, it's going to take a few weeks for you to realize that actually, without him, life is bloody good !
You'll be able to do what you want, see who you want, eat what/when you want, wear what you want, watch what you want, bathe when you want, go to bed when you want, get up when you want, take the kids where you want, get home again when you want..............
You'll never need to listen to his smug, self righteous tripe again, never have to squeeze down your feelings because he's hurt you again, never have to clean/cook/wash/iron etc for him again !
There's a whole world of peace/calm/happiness out there for you and your DC to enjoy, without him sucking all the joy from your life !
You will be happy again, and a LOT sooner than you think !