I never pay attention in math

I never pay attention in math, but if I did, I still could not calculate how much I love you...

I pay much attention in english, but still I cant describe in words how much I love you, 

but I know:

I never wanna lose you... 

I'm not good in history, because I only can think of our future...

I never listen when I have geography, because I don't need an atlas to know that you are my world ? ? ?..!!