A former student at St. Michael’s College school has filed a $1.65-million lawsuit over an alleged sexual assault at the private, all-boys school.

The teen and his parents have filed court documents alleging the bullying and assault left him struggling with depression and severe mental health issues.

He claims teachers, staff and football coaches at St. Mike’s knew about the incidents, but did nothing.

Also named in the lawsuit are three former students, the board, the Basilian Fathers who run the school, the football coaches and administration.

Police launched an investigation last November and charged seven boys.

Three teens have since pleaded guilty to sexual assault with a weapon and assault with a weapon, one also pleaded guilty to making child porn.

Another teen’s facing a trial next year while the cases against three have concluded.