I'm just so stupid

Have you ever felt so stupid that you felt so worthless?
I have absolutely no sense of direction. I can't recognize roads the way normal people do. No matter how hard i try, I just can't. It's not that i don't make enough effort to memorize, it's just beyond my ability, i don't understand why too.
I've been living at this house for the past 20 years, and i just found out my way home last year due to some circumstances, i have to walk back home from school everyday, and that's the only road i know.
I have no sense of direction. I too cannot differentiate food. Good food? Bad ones? I really don't know how to judge. Maybe it's just hard to believe. Maybe it only applies to someone stupid like me.
Yuh, and i can't cook. Don't ask me why. It's some stupid reasons again.
After 18 years of my life, i've always known to be someone smart, or maybe intelligent. At this point of time, i beg to differ. I'm really starting to feel .... real stupid. I can't even do things that should be easy enough to master.
The "cleverness" i've always thought i have had just gone... Hm, that shows that i have really much to learn. I started to realize that i need to make much more effort to pick up a lot of things.
We only live life once, live to the fullest then.