Is that your kitten? The one in the picture? wow he is gorgeous! Brandy, I will second lonewolf's comment. Please take him to the vet. If he is your everything, I'm sure you won't mind getting him checked ahead of schedule. This kitten can be a beautiful, beautiful animal when he grows up. I can see it. He is gorgeous. Please take good care of him, as that cat can make you proud of how stunning he will turn out to be. I wish you both the best. Sorry, but there is nothing we can possibly do to help except encourage you to rush him to the vet. He could have FIP or even Leukemia.
Good Luck.
He DOES have to go to the vet. He could be diabetic or have thyroid problems - both of which are treatable. I would have had mine to the vet before I finished typing this sentence.
It sounds like he's very sick. You need to get him to the vet ASAP. I don't understand why you're waiting!