First of all, welcome to the site. Pull up a chair and stay for awhile. Can you decifer if the squeal is coming from the belt itself, or maybe from one of the pulleys? If it squeals most of the time then it is a pulley. If it only squeals when you crank her up and goose it, then it would be the belt. You can buy a belt dressing in a spray can at just about any auto parts store. Get a can of that, start the engine , then stand back and spray the underside of the belt. That will stop it if it is the belt. If it is a pulley, then most likely the bearing in the pulley has gone south and the pulley needs to be replaced. Let us know.