Dear Absent/Divorced Father:
Although we have never met and we don't really know each other, I understand that you are involved in a messy divorce involving one or more children, and I do know something of what you are going thru. I have been divorced three times myself. I was involved on the sidelines of divorces involving my two brothers and two sons (a total of 5). I was involved on the sidelines of quite a few divorces involving my friends. And when I was a lawyer, I handled approximately a thousand divorces.
I really do know something of what you are going thru.
I am sure that you want to be a loving and involved father to your wonderful children; and you are frustrated because you can't live with them. That is exactly what happened to me, one of my brothers, both of my sons and some of my friends.
Based on my experiences, described above, I have some advice for you. Some of this advice will be difficult to hear, and even more difficult to follow. I wasn't always able to follow it myself. And yet, I know this advice is completely correct.
First lesson: to be a loving, involved father in the lives of your children (as I am sure you want to be) you absolutely must not try to tear down or hurt their mother.
Every hurt suffered by her hurts your children. It is impossible to hurt her without hurting them. Every pain she feels, every inconvenience or disturbance she experiences means that she is that much less able to be the joyful, attentive, loving mother they need to prosper and develop. She is a strong woman, but nobody can conceal sadness or pain from children.
If you want your children to be happy (and you certainly do), then you MUST also want her to be happy. If you want them to prosper (and you certainly do), then you MUST also want her to prosper. One without the other is impossible.
Because you (obviously) don't want to hurt your them, you absolutely must swallow your pain and anger. You have to roll with the punches. You HAVE to. You don't have the choice of hurting her while being a loving father to them.
Second lesson: involved, loving fathers provide for their children. In today's society, "provide for" means money. It is OK to buy gifts for your them; toys, video games and the like. But you also MUST put food on their table, contribute to their rent, help pay for their socks and underwear.
Since you are not rich, you can't give her (them) large sums of money. But you can give her (them) some money. And you can not give money to them without giving it to her.
And it MUST be regular. Every week or every month does not matter. Regularity does. Our love does not come and go, so providing funds can not come and go.
Your children will remember the toys, but they will better remember that each and every week/month, their Dad came thru with some money. It does not have to be, and it probably can not be, large amounts of money. Regularity is much more important than size.
Third lesson: involved loving fathers are in regular contact with their children. Your right to physical visits might be limited, you might be too far away for regular visits to be practical, but you can write letters, send emails, and call. As in the case of the money, the visits and these other contacts MUST be both as regular and as happy as you can possibly make them.
Ask about school, friends, homework, hobbies. Remember special days (important tests, friends' birthday parties and so on) and ask about them. Comment on clothes, movies, haircuts, books and other things. Show that you know about their lives. And make every comment and question loving, happy and supportive. What ever the conditions of the contact, make each one something they fondly remember and look forward to doing again.
Absolutely never say one bad word about their mother. Completely hide your anger from them. A child who knows (feels) that the two most important people in their lives (their mother and father) are fighting is a scared, confused, unhappy child.
Nothing good can come from that.
Final lesson (and maybe the most important one): be really happy. Find a job you enjoy and work hard to be good at it. Get a hobby, and have fun doing it. The "high" from drugs, alcohol and other addictive behavior (for me it was gambling as much as anything) is false (no surprise there). Consider getting into a 12-step program and if you do, go to meetings every day, even twice a day, if necessary. But most of all, turn yourself into a happy person.
It is extremely difficult, maybe impossible, to be a loving, involved father if you, yourself, are deeply unhappy, angry or otherwise filled with negativity.
But if you are a happy person, lessons one, two and three will suddenly become easy to follow; automatic even. You will follow them because those are the kinds of things a happy, loving, involved father does.
P.S. Every single word here applies to the mother, as well as to every parent, regardless of marital status.