"just hope they are doing better than me". "it isn't about me is it?" You're clearly being selfless and trying to do what's best for them. I don't want to make you feel worse. I expect that even though they miss you, they will be doing better than you. But they might do even better if they do the thing of of alternate weekends and maybe a couple of nights a week. (you would have to be sure they had access to all their schoolbooks for homework etc. for the weeknights. It's getting more important due to their ages.)
Yet if one of the problems you had was he can be a bit controlling, and he does a fair bit of insisting..... and he doesn't want you to live in the same town as him in case he sees you with someone else, IMO this is about what's best for him, not you, and not the dcs neccessarily.
They've got the stability of school, but for half the time they are suddenly far away from their local friends, familiar surroundings etc. I suppose I should declare I have the view that if a parent would find it unsettling living in two homes, so would the children, they IMO, need a base. Where the partnership between parents was equal beforehand, and they live near to each other, it might work, but if he could be controlling, it wasn't an equal partnership, so I don't think equal parenting will work. I won't be offended if you don't agree with me, but I think you should think how much your trying to not it let be about you, is influenced by him.
Yes they need their Dad as well, but IMO that doesn't have to be for exactly the same amount of time as you. Especially if he can be a bit controlling, because if he's controlling with them as well, it's better if it's in small doses. I wonder if you have had any real life advice from experts? Wonder what your family has advised about the arrangement.
I hope someone will come along who can advise better than me. Meanwhile I hope you are able to talk to them on the phone or skype or something, particularly in the initial settling in time. And if they've been away for two nights already, comfort yourself you'll soon be together again.
Sorry if confusing got to post quick battery nearly gone and will lose post