You’re in a deeply dysfunctional possibly Abusive relationship.
Your children will learn from this, they’re going to grow up thinking this is normal and end up in the same place you are
He needs to either stop being such a controlling prick (highly unlikely)
Or you could tell him how it is, and inform him of your plans not beg permission for them.
If he won’t be a parent to them, make arrangements for family to have them and go
While you’re away, enjoy the peace and start planning to get this man out of your life
He won’t like your friends because the more friends you have the sooner the truth will land that he’s a really piss poor human being and you’re better off without him
Your children will flourish once his poisonous presence is limited to as little time as possible
Educate yourself on what support you could get if he’s gone, look at financial settlement possibilities and how you can stand on your own two feet.
Make sure you’re free by 30. Don’t waste another second on him. You deserve so much better