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It seems like he may have had second thought about leaving his wife and family. His wife might be holding something over his head like the children or threatening to harm herself, if he is a good father he may have missed his children and saw that it affected them (him leaving) so he made the hard decision to go back, these are just scenarios that may have made him go back to his wife and children. He may be mainly thinking about his children and how they would react knowing you are seeing him and that their parents may never get back together. If you still have questions you need answered then I would talk to him about the reasons he left and if you should move on. Moving on after a break up is difficult enough without adding the way he broke it off with you. Don't let this break up disrupt your whole life get out with friend and enjoy yourself do something that helps you to preoccupy your time. Work more so that you aren't sitting at home thinking about him and him breaking up with you.
Although he didn't technically break up with you it seems that is what he was trying to say in a round about way. With all the thoughts and emotions, it is hard to be focused on anything else but you have to bring yourself to do that, as hard as it may seem it's important for you to not linger on waiting for him to come back because you may find yourself waiting a very long time especially when it comes to his children. Remember the things you loved and did before you started dating him. What was your world like before you started going out? If you have dropped a few hobbies, pick them up again and friends you haven't seen in a while, go visit them. Now is the time to start taking baby steps towards healing form the break up. You only live once and now is the time to experience anything you wanted to do in life but held off on it. Don't let this break up break you.
I would really suggest being his friend until the divorce is final he may think that everything at once is overwhelming and he doesn't want to chase you away with his problems with his wife and the fact that he is still married and cannot give you his full attention yet. He needs time to find closure in the marriage and the only way he can do that is to get the divorce and finally be free I think once he is free from his wife he will come back to you ready to start a long term relationship with you but you may have to patiently wait for him. He backed off for a reason and since you are someone he often thought about and wanted to be with I could not imaging him purposely turning you away after know he finally has a chance to have everything he has ever wanted plus his wife may be threatening to say that he was already seeing someone during the divorce proceedings so just give him time to close this old chapter in his life in order to start a new one with you. Don't lose contact with him stay in his life even if it's only as friends for the time being he will appreciate that you still want to be there for him and you haven't walked away.
I'm sorry I thought you said he was still married to his wife, sorry for the mistake. Like you said there is a reason that God put you back into his life so don't dessert him when he needs you the most, even though he has some what pushed you away you should still be there for him as a friend until he is ready to take the relationship to another level. I would say to give him time and maybe call every few days just to let him know you are still there for him. This is just going to take some time and patience on your part but you also have to know when you have waited too long also, I would give him a time period of six months at the longest then ask him where you stand so you know if you should move on or stay and fight for him. If he tells you to move on then do so and hope that he misses you too much to let you go again. He may be afraid to be a failure at love again and this may be why he is retreating away from you.
Very good idea about waiting a month and then write him an email or text him telling him you are thinking about him and missing him. Try to keep the lines of communication open during this time you are giving him to figure things out so that when he is ready to come back he won't find it awkward doing so. It sounds like you know exactly what you want and will wait to get it, good for you! Good Luck to you.