* "Se cuidan mucho" translates to "Take care of yourselves"
* "Fufyy" is a slang term, likely a nickname or affectionate term.
* "Me avisan cualquier cosa" translates to "Let me know anything" or "Keep me posted."
Therefore, the entire phrase could be interpreted as:
"Take care of yourselves, Fufyy. Let me know anything."
It's a friendly and casual way to say goodbye, reminding someone to stay safe and to keep the speaker updated.