A Staten Island teen who pals said had been relentlessly tormented by bullies leaped to her death in front of a train yesterday as her classmates looked on in horror.

The Huguenot Staten Island Railway station platform was packed with fellow students from Tottenville HS at around 3:15 when a sobbing Felicia Garcia suddenly broke away and jumped.

She died at Staten Island University Hospital.

“I can’t. I’m done. I give up,” the 15-year-old tweeted Monday. Her sudden death came as a shock, but friends blamed bullying.

“She got bullied in the school, especially by the football players, because she looked different and had piercings,” said senior Amanda Liquori.

Another friend, who asked that her name be withheld, was at her side when she jumped and had no idea what she planning. That friend also said football players targeted Garcia.

“She wouldn’t have done it if she wasn’t bullied,” another pal, Alissa Compitello, wrote on Twitter. “All this girl wanted was to be left alone. And nobody could do that for her.”

Gabriella Leone, whose younger sister witnessed the incident, said Felicia, who lived in foster homes, “had a terrible life on top of all the heartache — bullies at school taunted her and spread rumors. I hope all bullies get punished!”

Felicia had written online of her depression.

On her Instagram account, she had a picture of her eyes crossed over by the word “Depressed” with the caption, “Just because someone is smiling doesn’t make them happy.”

Chancellor Dennis Walcott is in touch with the girl’s legal guardian, according to Department of Education spokeswoman Margie Feinberg.

Two years ago, another Tottenville HS student killed himself at the same station.

Additional reporting by Jeane MacIntosh