The accused drunk driver charged in a brutal head-on crash that killed two 14-year-old boys on Long Island claimed he was a millionaire and begged cops not to tell his wife he’d been partying with women, prosecutors said Monday.

Amandeep Singh, 34, even thought he was actually in New Jersey when cops caught up to him after the May 3 wreck that left the Roslyn Middle School eight-graders dead and two others hurt, prosecutors said following his Nassau County Court arraignment on a 15-count indictment.

“Two 14-year-old boys, Drew Hassenbein and Ethan Falkowitz lost their lives in an instant because of a drunk driver,” Nassau County District Attorney Anne Donnelly said at a press conference.

“It was a catastrophic crash that miraculously the defendant was able to survive relatively unscathed,” Donnelly said. “But he didn’t stay at the scene to face the accountability for the destruction he had just caused. He fled the scene on foot.”

Donnelly said Singh hid behind a dumpster at a nearby shopping center, where he was busted by cops.

She said Singh, who has a prior drunken-driving arrest as a minor, told police that he was wealthy and begged them not to tell his wife that he had been out partying with women.

Allegedly still in a drunken stupor, he asked, “What are you guys doing here? Aren’t we in New Jersey?”

Cops said they later found a bottle of tequila in his truck.

“Four hours after the crash the defendant’s blood alcohol content was allegedly 1.5 and also revealed the presence of cocaine,” Donnelly said. The legal limit is less than .08.

She said Singh had been driving at 95 mph against traffic on North Broadway — which has a speed limit of 40 mph — when his 2019 Dodge Ram slammed into the Alfa Romeo Hassenbein and Falkowitz were riding in with a 16- and 17-year-old boy.

The boys’ friends and relatives packed the courtroom Monday.

East Hills Village Trustee Brian Myerson said the families were doing “absolutely terrible.

“This is just a nightmare that no family should have to go through,” he said.

Singh, who is being held without bail, also had supporters in the courtroom, including his family.

“He’s got a very, very strong support system,” defense attorney James Kousouros said outside the courtroom. “Several relatives, his wife, his father, his aunts, uncles.

“You know he’s a human being who is hurting tremendously right now,” Kousouros said. [He] understands the pain and anguish that the family is going through. So, he’s in this state of waiting to see what the evidence is, how we are going to proceed. It’s a very difficult time for him and his family.”

Singh is charged with manslaughter, vehicular manslaughter, vehicular homicide, assault, driving while intoxicated and leaving the scene of an accident, among other counts.

He pleaded not guilty and is due back in court on July 25.