I dunno what you are worried about, you never some across on here as someone who does not think about things properly. I am sure you are making the decision because your instincts tell you he is right for you, if you're not even moved in yet and thinking this way then it's not the time to do it, but i think you know that too. If he knew you had these doubts it might make him unsure himself, it's tough trying to protect yourself and your kids and take a step into a relationship that might mean you lose your previous independence. Just go for it, you'll never know how it would have gone and if he does ever ask you to leave it will mean you've not been the person you were when you got together, he's making you part of his world, enjoy it and good luck