I think I'm smarter than the average person
What makes you smarter than the average person?
Well I know for sure that if I got straight A's at school, which means I'm smarter than the average person.
Having confidence is a positive thing.  Make sure that you are doing this in a way that does not come off as cocky to others.   You could end up losing friends or being humbled.
I'm feeling pretty okay with feeling cocky about it.
You might be okay now but feeling cocky turns people off. You can be confident without thinking that you are better than others which makes people feel bad.