Rokor, I mean this with all sincerity. If you really want to be a professional in the game industry, you need to start using English in its proper form. If you are in a foreign country, then I apologize, but the advice is still warranted. It may seem like game design and Language Arts are not related, but it's difficult to advance in most industries if you cannot compose a professional email.
Honestly Rokor, it is hard to hear that you dislike reading, because that is the easiest way to improve your grammar. When you post on these boards, I can tell you are in 7th grade. I really recommend finding something you enjoy reading. It can be comic books, books based on games, or even magazines. Anything written by professional writers will go a long way to making you a better writer.
Eventually you will even be able to mask the fact that you are in 7th grade. Being a professional starts with presenting youself as such. You can begin today by spending a bit more time on your posts.