If you use correct gammAr and spelling, people will think of you less a as a immature pre-teen, and more of an intelligent person.
You should see a professional about your ADHD. It seems obvious that you have it, considering the number of posts you have already have.
Go watch someone die. That should fix you right up.
EDIT:
Make sure it's not a relative. I want to see you come back intelligent, not depressed.