Yes. That is a long time. Imagine how you would be feeling if your mom and dad didn't feed you for a week.
I think the best thing that you can do at this point is ask if there is someone on this board who can take your chameleon from you, and give it a home with a grownup who understands what responsibility is.
You may think that you are a capable person, and not a mean or cruel person, but you have tortured your pet.
Please, allow someone else to take care of your chameleon, and please do not get yourself another pet for several more years.
As to feeding your cham meal worms and the other issues at hand, you should be feeding crickets not meal worms. Make sure to mist his plants in his cage well several times a day until someone can pick up your pet from you.
You need to spend some time thinking about what you have done here. You have been starving an animal in your care. In some states, that is punishable by law. It's called neglect. When parents do it to children, they go to jail.