I can only tell you that it gets easier as they get older. Still, doing it alone is the hardest parenting of all. I have been Daddy and Mommy for eight years now and my ex never sent me a dime. Be thankful for the things you do have and I can promise you that the rewards you will reap from pouring your love out on those children will enrich you many times over. It is not going to be a walk in the park, but when your husband does get home put the kids in his lap and go take a walk in the park by yourself!!! Your alone time is precious find ways to utilize it when the chance arises. Of course never forget your allies in Al-anon....we are here to help you stay sane.
Keith