Can they take your boyfrieds stuff if you are not married and the judgment is on you?

No, unless he is named in the lawsuit and provided notice. In order to be liable for a money judgment, the court must have something called jurisdiction over the person being sued. That person must be served with a complaint naming them as a defendant and have an opportunity to defend themselves in court. If your boyfriends name is not on the judgment, then his property cannot be used to satisfy the debt. If you want him to be liable (like you both owed the credit card bill but it just happended to be in your name), then you can sue him separately and ask the court to order him to pay you half.