He finally came out of the closet in 2020:
SpongeBob SquarePants Is Gay! Nickelodeon (Finally) Confirms His LGBTQ Status for Pride.
If they did, they waited until the creator of Spongebob passed away.
Aritcles and reading are your friend.
https://people.com/celebrity/spongebob-asexual-not-gay-creator/
Addressing issues raised last week after at least two conservative Christian activist groups said the hugely popular TV cartoon character and his best friend, Patrick Starfish, are being exploited to promote a homosexual lifestyle, SpongeBob SquarePants creator Stephen Hillenburg, 43, scoffed. He said the allegations are far-fetched, and that his agenda does not go beyond entertainment.
“It doesn’t have anything to do with what we’re trying to do,” Hillenburg tells Reuters. “We never intended them to be gay. I consider them to be almost asexual. We’re just trying to be funny and this has got nothing to do with the show.”
He can’t be homo he is sweet on Sandy the female squirrel