Sometimes dogs have a problem with being alone and like to let the owners know about it. These guidelines will help you overcome this problem and have the dog be happy and safe in the crate or in the home.
One important point to make when treating this problem, if the dog destroys or damages something in the home while you are gone, do not punish the dog. Dogs cannot relate to past events if they are being punished for something they did (they live in the now). For example, if you call him over or go to him to punish him for destroying the carpet, he would think he is being punished for you calling him or with you walking up to him. You risk developing an additional bad behavior that can lead to aggression. Work with and train the dog and set him up to succeed as much as possible and you will see your separation anxiety problem disappear.
If there is a point you are frustrated and are considering re-homing or taking the dog to the shelter or rescue, consider a citronella collar. This collar sprays a bad smelling mist when the dog barks or whines while he is wearing the collar. This collar should be used last resort and only temporary when you need the dog not to bark or whine while away or other occasions where it is necessary. Also, you can consult with your vet about various medications to help your dog with this problem. Again this is a last resort as no one likes to have a medicated dog and some medications can take several days or weeks to become effective. Neither of these options should be considered a permanent treatment but as a temporary solution to prevent the dog from losing his home. Start a training plan immediately to teach him that being left alone is okay and safe then gradually wean him off of to where he doesn't need a citronella collar, or medication, or anything.