You should have a detailer take a look at it. Your paint is a 2 stage paint. There is a base coat, which is your color. Then there is a clear coat, which is clear and meant to protect the color. Chances are that the clear coat is failling. A good detailer will be able to remove a small amount of your clear coat using compounds and polish. This process can restore a shine to your paint if done properly. By the way, this is something that is best left to professionals so make sure you find someone who knows what they are doing.