Nickelodeon Star Miranda Cosgrove ... Fan: I'm Going to Kill Myself 'Cause You Don't Love Me

Nickelodeon star Miranda Cosgrove got a spectacularly horrifying set of pics from a fan ... who threatened to kill himself with a hairdryer in a bathtub because his love for her was not returned.

Joshua Stockton also sent Miranda pics of a slit wrist, writing, "Maybe I'll finish the job I started."

Stockton was upset because he was vying for Miranda's affection by sending her gifts through UPS and she had them all returned -- unopened.

Miranda filed legal docs -- asking a judge for protection -- claiming Stockton would troll her social media, looking for fan sightings of the actress. If someone posted a pic of Miranda at USC -- where she goes to school or at Disneyland -- Stockton would show up.