Spanish....

the one thing that has me confused with english :

in my native langauge when writing .....if your a female which i am .....then you supposed to write "i" in the lower case only.....

if your male then you write "I" in upper case only.

example :

Male : I went to the store

Female : i went to the store

does english have any rules about this ?......at school i have seen some girls writing in the upper case which threw me for a loop LOL