It is gibberish. It means, "If your all." If the 'i' in Si had an accent, it would mean, "Yes your all," and it would STILL be gibberish.
Your my everything
it mean "only you"
Yes, you can
You love is all about you.
It means your the best or i would do anything for you.
It means, "if you want".
'Much with all my heart but if you do not want to tell me
"Llámame si tú puedes." means Call me if you can./Call me if you are able.
This means "For you and all your body".
You will know if you are cool
Uy si tu sabes todo: Translation: Oh, yeah, you know everything. (In a non-sarcastic manner) Uy is not a real word. It sounds like an expression.
I think you mean: "De moi si tu m'aime". In English: It's from me if you love me.