What if he does not want you back and is happy with the way things are
? The only way you will find that out is if you either ask him yourself or see what sort of response you get when you put into place some of the things you want to do to encourage him to come back to you. All you can do is give it a try and if things don't work out then you have given it your best shot. At least you can say you tried your very best but perhaps it is not meant to be, so therefore all you can do is move on.