She kissed her summer goodbye.

A Connecticut teen was hauled off by a gun-toting police officer for kissing a boy at a Berkshires sleep-away camp, according to a new lawsuit.

The 15-year-old was labeled a “security threat” by Camp Emerson director Sue Lein — who called Hinsdale, Mass., police on July 11 to escort the young woman to her parents, who were waiting for her at the gate, according to court documents filed yesterday in Bridgeport, Conn.

“I don’t understand why [Lein] acted this way,” said the minor, who is called “Jane Doe” in the lawsuit to protect her identity. Her boyfriend is called “Dick.”

“She kicked me out of camp because of a simple kiss the day before my birthday,” the girl said. “It was just a kiss. She is a big bully — she made me feel horrible about myself and she ruined my summer.”

The girl’s father, Manhattan attorney Jeff Miller, is suing the camp, which costs about $7,000 per month, for more than $675,000 in damages, including for defamation and emotional distress caused to his daughter. Jane Doe was expelled two weeks into her four-week stay without her belongings, which the camp allegedly refuses to return.

The camp director called the little girl a “slut,” “loose,” and a “tramp,” and accused her of taking her bra off during the “innocent kiss,” according to the court papers.

Camp counselors even encouraged the kiss because it was the boy’s first, the suit says. The two co-eds were nabbed locking lips behind an arts-and-crafts building at dusk.

“This kiss was a beautiful, innocent moment,” court documents say. “This summer romance made plaintiff Jane, a child of divorced parents who suffers from anxiety . . . and who always felt insecure and inferior to her peers, feel confident and beautiful for the very first time in her life.”

An Officer Miller, a spokesperson for Hinsdale police, said they are currently investigating the incident and had no further details.

“I’m outraged, truly outraged,” dad Jeff Miller told The Post. “She was having a great summer. It was her fifth summer up there and it was her boyfriend. She’s really upset. She cries when she talks about it.”

The camp has a three-strikes disciplinary code, but both teens were chucked from the camp with just one infraction.

And the campers and counselors aren’t squeaky clean. According to the lawsuit, campers urinated on each other, called the nutritionist fat and were forced to change in front of other campers. The suit also claims that counselors drank alcohol and did drugs and that the kitchen staff slept and smoked cigarettes in the same bunks as the campers.

“You’re supposed to have your first kiss at sleep-away camp,” said attorney Rosemarie Arnold, working for the father. “That’s normal, but they literally threw her out of camp, and had armed officers escort her out. They called her a security threat just for a kissing a boy, who is her boyfriend.”

The camp director did not respond to a request for comment.