Oh for fuck's sake, the arsehole! Oh I'm so sorry @Glitterpony!! How shitty indeed!!
I do think you deserve some time to be sad, love. What a bastard. What a shit he is, to string along the lovely woman who has stood by his side through the years, and jerk you around, and fuck you over, and in such a stupid, selfish, thoughtless, and childish way. He's a right bastard isnt he! But I know it still hurts. There's obviously a reason you were together so long, so of course it hurts.
But I do hope you find your anger. It's a wonderful weapon, and armour, to have at a time like this.
Can you go out and pamper yourself, spoil yourself for a bit? Go and do something he would never happily do with you, and enjoy it without his moaning. Or go get a bottle of wine or 6 and get rat arsed and shout about him with a mate. Or go buy something beautiful and expensive, just for yourself, and just enjoy looking at it / looking lovely in it. Go get a drastic, cool, young, new hair style, and dye it fire engine red or something completely mad, and go out on the town and chat up all the fit young men like a real cougar!
Maybe if you can get him and his shit self off your mind for a bit, you'll come back to the issue angry?
Oooooh, what a Grade A Bastard he is.
(goodness, this is a sweary post!)