dtewi, you have embarked on a quest for knowledge. This is both good and bad. I admire your youthful vigor and hunger for truth, but I must warn you. You may become blindsided with false (but true) ideas about how reality and logic work. When you say "imaginary things are fake" you turn your quest down a dark and dangerous path.
To really understand the powers of your own imagination, you must watch these:
Part 1, Part 2, Part 3
Wait until you learn about quantum physics. I've seen so many people getting straight A's in math and science thinking it's easy to memorize formulas and plug in numbers, but once they get into solid evidence proving impossible things and disproving physics they stop to ask "Why?" and start failing.
Imaginary numbers have many important uses. Just like imaginary friends. Both are necessary to build empires.












