HELP!! My 3-Year Old is Turning Me Into a Zombie!!!

My son is almost 4 (will be the beginning of December) and he is literally turning me into a zombie! From the time he started walking, he has walked himself to our room, and crawled into bed with us at sometime in the middle of the night. At first it was cute, but now it is driving me mad! I purposely keep myself up until after midnight in the hopes that he will fall asleep in his own bed, and when he does, I sneak upstairs, trying not to wake him. But like clockwork, at 3am there he is.
We have a king sized bed, but when your son sleeps sideways, it doesn't really matter how big your bed is. To make matters worse, he's been going through this I want mommy to do everything phase for about the last 2 years, so he sleeps as far away from his dad as possible. That leaves me with a tiny sliver of the edge of the bed to try and sleep on. So, I spend what's left of the early morning hours hanging on to my sliver for dear life. Let me tell you, it's tough to get any sleep, knowing that you can fall off the bed at any moment.
And as if this wasn't bad enough, this morning I woke up laying in pee soaked sheets. This was very ironic since we were up until well after midnight listening to my son scream at the top of his lungs because he wanted his cup. My husband and I have stopped letting him take a cup to bed with him, as we are trying to potty train him (that's not going well either), but apparently he found a drink somewhere.
So, I am desperate here. Am I the only one out there who has gone through this? Can someone please give me some good advice on how to get him to sleep in his own bed? And while your at it, how the heck do I potty train him? You can see my previous post on this issue; he is so stubborn!!
Many many thanks in advance! :)
~Dana~

Potty Training a 3 Year Old Boy - HELP!!!!

OK, I am at my wits end with my son. He has to be the absolute most stubborn child on the planet! We have been working on potty training religiously for 4 months now, and he just refuses to "get trained". He is in pull ups, which he calls his big boy diapers. We put him in regular underwear when we are feeling particularly brave, but my couch just can't take the pee anymore! But I have to tell you that it is so infuriating to watch him do the potty dance and run around the house when he needs to go, rather than just go to the da** bathroom. If we pick him up and take him in there he starts screaming and just goes in his pull up anyway. And then looks at us with a sly smile and says "I'm wet. I need a new diaper." Well, what the heck did you think was going to happen when you peed in your pants? AARGGHH!!!!
My daughter is almost 11, and she was potty trained a month after she turned 3. It was literally a 1 day process. Are girls just easier to train than boys? It's times like this that I wish I could just take him and drop him off at a potty training class somewhere and pay someone else to do it. Maybe I just need a Potty Training for Dummies book or something. He's going to be 4 in December, so he is plenty old enough, not that he seems to care!!