BLOODY HELL! Yekaterina Pusepa is arrested after she allegedly stabbed her boyfriend and made Page 1 of The Post. (Seth Gottfried)

CUT & DRIED: Alec Katsnelson shows off his scar in Greenwich Village yesterday, the result of gal pal Yekaterina Pusepa’s alleged knife attack. (
)

They fought so loudly that the neighbors could hear every word through the walls. Their lives revolved around clubs and drugs. And on one terrible night in Manhattan last May, in the heat of an epic squabble, Yekaterina Pusepa plunged a kitchen knife into the chest of boyfriend Alec Katsnelson, nearly piercing his heart, police say.

Yet the 23-year-old Latvian-born stunner, who had taken back Alec after he allegedly hurled her down a flight of stairs, can’t let go.

Asked if she still loves him, Pusepa paused.

“I don’t know,” she whispered.

In a winding, hours-long jailhouse interview, Pusepa described a mad, tragic love affair — one that could end with her spending 12 years in prison, then being deported to the country she left when she was 11 and where she has no friends or family.

Katsnelson, 23, who underwent surgery and recovered from the wound, is already out of the hospital and back to his hard-partying ways, she claimed.

He has not come to see her at Rikers, where Pusepa faces attempted-murder charges and is being held on $75,000 bail while her court-appointed attorney battles the Manhattan district attorney for police reports on the case.

His only attempt to communicate with her came in the form of a cold, direct order: Abort our baby.

She claimed he impregnated her in March 2012 at roughly the same time as their first big fight, which ended with Katsnelson being led off in handcuffs.

Then, when she was arrested, he sent word to Pusepa through her friend that he had no intention of becoming a father, she said.

“He said he wanted me to have an abortion,” she told The Post.

Pusepa rejected his demand but later went through with the procedure after learning the child would have been removed from her and placed in foster care.

“I was told the baby would go into the system, and I didn’t want that,” she said.

Her feelings about Alec now?

“He’s a child,” she said. “He has no remorse. He supposedly had all these injuries, and he’s running around in the streets, smoking . . . going to clubs. We’re both in this because of what he did.”

Theirs was not the fairy tale Pusepa imagined when the two met at the club Pacha in November 2011.

She cut an alluring figure: wavy brown hair, porcelain skin and a sultry stare. Pusepa worked as a waitress at Southern Hospitality, the Hell’s Kitchen barbecue restaurant owned by Justin Timberlake, and lived with a male roommate in Bushwick, Brooklyn. She enjoyed hitting the club scene.

Katsnelson was a regular at Pacha, the cavernous West Side dance hall, a chiseled hunk with a football star’s physique who managed a Manhattan Duane Reade drugstore.

He offered ecstasy to her and her friend, Pusepa claimed. They talked and danced, and soon began dating.

“We were exclusive,” she said.

Katsnelson tells it differently, saying that he never sold or used drugs, that she cheated on him, and that he never knocked her up.

“She’s lying,” he said. “We weren’t even having sex at the end.”

Though she said she never moved in with Katsnelson, the two spent nights together at his Gold Street pad downtown.

Recreational drugs were always around, she said. Pusepa admitted to abusing ecstasy.

“I had a drug problem,” she said.

He was no less interested, she said.

Their March fight erupted, she claimed, when Pusepa discovered he had stolen money from her purse — a charge he denied at first, but then tried to justify by saying, “What’s yours is mine, and what’s mine is yours.”

Neighbors at the time said the quarrel was triggered when he confronted her about her drug use.

He “put his hands on me,” she said. “I thought I had broken my tailbone. It hurt so bad, I couldn’t sit down.”

Katsnelson was busted for assault and spent a weekend in jail, but charges were later dropped. His family blamed her for the dust-up. She got an order of protection against him.

But the two got back together.

“He pursued me, and I was in love. I thought he could change,” she said.

Then came the fight that changed both their lives.

Police said Pusepa first claimed that Katsnelson grabbed the knife as she held it and plunged it into his own chest in a twisted suicide attempt, then changed her story to say she struck with the blade to fend him off.

Katsnelson said the two had been drinking when he received a call from another woman. Pusepa flew into a rage, he said, and began ransacking his apartment. He tried to stop her, after which she stabbed him, Katsnelson claims.

When police arrived, Pusepa was standing in the street sobbing, drenched in blood.

Pusepa complained that the media had misquoted her statements and portrayed her as “some kind of monster.”

She refused to discuss the incident in detail, but added, “The stories that came out said I dragged his body out of the building and into the street. He’s 6-2 and 250 pounds. I called 911 and stayed with him to make sure he was OK.”

She claimed that during the course of their six months together, Katsnelson had sought to control her by frequently bringing up Pusepa’s vulnerable circumstances: no family or close friends.

Her mother, Tatiana, had moved from Riga, Latvia, to LA in 2001 with Pusepa and the girl’s grandmother to be with the mother’s sister.

But her mother fell ill with ovarian cancer and died in 2006, and Pusepa came to New York, bunking at a youth hostel in Times Square. She had a green card and was applying for residency.

“I wanted a fresh start,” she said.

The outcome of the case is uncertain. Pusepa’s attorney plans to argue self-defense, she said; the DA has not offered any deals, insisting on a dozen years behind bars.

Katsnelson doesn’t think “anybody should rot in jail,” but said he’ll never reconcile with her.

“Everybody has feelings for someone they loved once in their life, but when you have something that traumatic happen, there’s no way you can go back,” he said.

Additional reporting by Michael Gartland