You might want to get a second opinion.

i know it sucks i cant read or wrtie well it takes a long time im in a low english class its relly depresing

Dyslexia? If you can't find a medical exuse then find a way over it. If it take long to read or write, then spend hours a day practicing. Get motivated. Any sort of "disorder" is not really a disorder. We weren't created to read books and write. Its the Youtube age. I never pitied on any person with a born disability. A blind person would be very skilled in hearing and smell and the presense of people. Get beyond medication.

You had me until you said "shiz". If you have a language disability you probably wouldn't be able to process the complex intricacies of language without a lot of help, certainly not enough to mis-spell a swear word. From this brief post it is clear you just haven't read enough.

To be a good writer you need to be a good reader. Start with Beverly Cleary and Judy Blume books. If those are too hard then read Amelia Bedila.

Don't use texting, IM and limit your online surfing. You write like most people under 25. Little common sense and even less grammatical skill. There's nothing wrong with you, you just recognize you're not as good in an area. So work at it, get better.

ADD/ADHD are problems with focusing...sounds like you can focus. If you are just a slow reader then practice will help you. Nothing else. Don't medicate yourself and don't sell yourself short.