I've been dating my boyfriend for a year now were both in our 20's and we both have kids.he was married and with his ex for awhile she is also the mother of his kids she don't care for me much,but I adore him and the kids we both have our own places now and I want to take the next step to living together but he says don't rush it eventually his divorce has only been final a couple months and she still calls because of the kids,my child is with me full times and he has his girls a good bit,and when he does have them I feel like I'm only existent when he wants,so my question is when do you think he will be ready for next step?

It will take a while for him to be ready. He has already given you the reason why- his divorce has only been finalized for a couple months and she still calls him.
At this point he is making a good decision. It is a bad idea for you to try to force or rush anything with someone who has just gotten out of such a commitment as marriage. And whether you have been together in a serious relationship for a year, it's still a little too soon to be moving in together. You may be ready to settle down- but he is still in the process of moving on (and it's probably pretty hard to do with his ex-wife calling him) So cut him some slack, and wait until he says he's ready, instead of bringing it up again or worrying about it.

If he's not ready yet, then you can't force him. There's no rush. Moving in together is a huge commitment. So it's better to focus on getting to know each other better. Once you feel more comfortable with each other, things will flow naturally.