If I were you
I think you mean «toi aussi», which means "you too"
Même si je ne peux pas être avec toi, mon cœur est à toi means 'Even though I cannot be with you, my heart is yours' in English
C'est si tout in English means "That, if any." Si c'est tout, however, means "If that is all."
Sí means "yes". Si (no accent) means "if".
Si in Spanish means Yes in English.
If I were you
'si je' means "if I" in English.
It means "But you are so funny to me" in French, no Cajun.
"Si alguien" translates to "if someone" in English.
"si"= if "yo"= I so, "si yo" means "if I"
"Si no está en inglés" means "if it is not in English" in English.
"Llámame si tú puedes." means Call me if you can./Call me if you are able.