Matthew Livelsberger, a former Army ranger, excitedly told his ex-girlfriend about renting the Tesla Cybertruck pickup just before his tragic death. He took his own life and detonated the vehicle outside Trump International Hotel in Las Vegas, comparing himself to Batman in his final moments.

While in Denver on December 29, the 37-year-old soldier reached out to Alicia Arritt, his ex-girlfriend, at 9 a.m. Livelsberger had recently left his home in Colorado Springs after his wife accused him of infidelity, and he sought solace in connecting with Arritt, with whom he had previously been romantically involved.

“I rented a Tesla Cybertruck. It’s the s–t,” Livelsberger said, according to text messages obtained by the Denver Gazette.

Despite Livelsberger being married with a child, Arritt was surprised to receive a message from him, as they had not been in touch since ending their relationship in 2021.

The single mother says it was nice to hear from her old boyfriend as he sent several more messages along with photos and videos of the truck.

“I feel like Batman or halo,” Livelsberger texted seven minutes after the initial message, referring to the superhero character and video game franchise.

The futuristic truck caught Arritt’s attention, leading her to ask how fast it goes.

“Ungodly,” Livelsberger responded, according to the outlet.

Livelsberger switched the discussion to tell Arritt what he had been up to but never gave any indication of the explosive plan.

“I’m building drones in my new position,” he said. “You would love it.”

Arritt described Livelsberger as the “kindest man” she ever knew and said he once bought his sick mother a new home.

The 37-year-old Army soldier’s wife broke up with him on Dec. 26 after she discovered he was cheating on her, sources told The Post Thursday.

Livelsberger left the couple’s Colorado Springs home following a post-Christmas argument where his wife reportedly told him that she knew he had been cheating, the sources said.

After leaving the home, Livelsberger used the Turo app to rent the Cybertruck before driving to Las Vegas.

He parked the explosives-filled vehicle in the valet area of the Trump Hotel where he fatally shot himself in the head.

Livelsberger was the only person killed in the incident and his body was burned beyond recognition. Authorities identified him from his passport and Army ID found inside the truck.

Seven people sustained minor injuries from the blast.

Investigators discovered fireworks-style mortars, camping fuel and canisters inside the truck.

The FBI was investigating to see if the bombing was politically charged because it occurred outside a hotel owned by President-elect Donald Trump and inside a vehicle made by the company of Trump’s close ally Elon Musk.

Arritt questioned why Livelsberger would do it, as she knew him as a conservative, the Denver Gazette reported.

Officials are also investigating whether the active Special Forces soldier, known to be a “Rambo-type patriot” and staunch Trump supporter, purposefully picked a Cybertruck to limit civilian casualties, a source told The Post.