Here's a possible interpretation and a correct translation in English:
Possible Interpretation:
"Tell your confidant that it's me who makes you happy."
Correct English Translation:
"Tell your confidant that I am the one who makes you happy."
Explanation:
* "Dile a tu confidente" means "Tell your confidant."
* "Que el soy yo" is grammatically incorrect. It should be "que soy yo" which means "that it's me."
* "Te hace feliz" means "makes you happy."
Therefore, the most accurate translation in English is: "Tell your confidant that I am the one who makes you happy."