Best Answer - Chosen by the Asker
It's used differently:
yo/tu/él/ella/nosotros/vosotros/ellos/ellas/usted/ustedes.
These are used to interpret a person, like in,
"Yo soy un hombre" (I am a man)
"Tu eres mi hermano" (You are my brother)
"Ellos son altos" (They are tall)
It's like in dutch, ik/jij/zij ...... Except that in spanish it's not obligatory, you can say,
"soy un hombre"
"eres mi hermano"
"son altos"
mi/ti/su/nuestro/vuestro/su ...,
are used to describe something that belongs to the person, like in
"mi hermano" (my brother)
"su casa" (his/her house)
"Nuestra casa" (our house)
Like in dutch, mijn/jouw/zijn/haar/hun ....
And then you have me/te/se/nos/os/se,
which is used to describe an action, it goes with a verb, like in,
"Me levanto" (I am getting up)
"Te quiero" (I want you)
"Te veo" (I see you)
"Se matan" (they are killing themselves)
"Os gusta" (he/she/it pleases them)
