I've never been a big supporter of dogs sleeping on beds... For some dogs, this gives them comfort (because it assures them they are part of the pack), but your dog wants to lead the pack, he thinks your bed smells too much like you, and so he peed on it to mark it as his own territory. But your dog should have his very own territory -- even in the house. Get him a dog transport crate/kennel, and have him sleep in there... assuming you'll never go into the kennel -- you won't have to worry about a pissing contest, because that will be his space. In fact, this might be a good transition method to get him off the bed, and out of the house -- first get him adjusted to sleeping in his kennel -- once he's adjustd, you can move the kennel outside, that's if you still want him to be an outside dog. If you're sure you want your dog outside, get a dog house, let him adjust to that inside, then move the doghouse outside.

I think you need to teach how to use Answerbag, so he won't go crazy from not having what to do,

You don't have to make him an outside dog. I have a pitt and he is very well mannerd. Never once chewed or went to the bathroom in my house ever. I started kennel training him right away when he was a puppy and I swear by it. It is very important your consistant.Get him a kennel, and every time he does something bad put him in there. Or even when you leave to go to the store. He won't pee in his kennel. It will teach him to control his blatter.And after awhile he will go tn there on his own. It's like his own little room.

both of you need to take some classes at PetSmart

Don't stick him out side...that's not going to make most dogs happy at all...why bother having a dog you leave out? TRAIN HIM and SUPPORT HIM IN DOING WHAT YOU WANT HIM TO DO! (or in this case NOT do!) Use a Crate, use baby gates (stack them if you think he'll jump over them. Get him a bed of his own, DO NOT allow him up on yours...sit on the floor sometimes with him to cuddle up. If you train him to Come, Sit, Stay, Lay Down, Back up and GO TO YOUR BED...(hint...Praise and treats...and SHOW HIM what you want him to do!) You can help him become the great dog you want him to be. Buy a Kong and stuff it with yummy stuff and give that to him when you crate train him. Nonfat yogurt, or nonfat Cottage Cheese...a spoon of unsweetened apple sauce, or peanut butter or bits of cut up (plain) human grade beef or turkey jerky added and then FREEZE the whole thing over night...it will last a good amount of time and keep him busy and delighted with going into the crate...play some music for him too (radio or repeat CD's) creates "white noise" and calms. I know you are frustrated...you didn't say how old he is...make sure there is nothing physically wrong with his health...(catch up a bit of urine in a tight closing container and drop THAT off at your Vet if you think it's at all possible he could have some sort of bladder problem...for about $12.00 to $15.00 you can rule THAT right out!) You can do this and so can he...with positive reinforcements and support!

I took him to obedience class but he wanted to play with the other dogs so much we stopped going :/ do you know if there is such a thing as one on one classes, or should i try a regular class again?

If you have to have him outside try getting another dog so he has a companion. Dogs are pack animals and see themselves as part of the family. He will be much happier with someone to play with. If you don't want him to be an outside dog, it could just be that he is trying to get your attention. Take him out for no less than 30 minutes in the morning and 30 minutes in the evening and just play with him, or walk with him, or something. He just wants to be loved.

Sounds like this dog needs stimulation and exercise!! (Along with some obedience classes with his family.) Have you considered doggie daycare?