Sorry to hear that dude. Went through a divorce myself (no kids involved though so I can't imagine what that must be like). I am sure that there are legal channels you can pursue to get access to your kids. That stinks though that you have to fight to get to see them.

I remember when my best friend went through his divorce and he had two small children involved. We sat down and talked and it was decided that some times the hardest thing is the best thing to do. It's hell leaving but staying in a bad, hurtful relationship is far, far worse.

Hang in there. You'll come out the other side a much happier and healthy person.