Justin Hartleyrealizes that dating is a “natural” and “healthy” part of life once the teenage years hit, but it doesn’t make it any easier on him as a dad.

On Tuesday, theThis Is Usstar, 42, visited the set ofThe Tonight Showand dished toJimmy Fallonabout his conflicting (yet undeniably uncomfortable) feelings surrounding daughterIsabella‘s romantic pursuits.

“She’s wonderful, but she’s 15 now — 15 going on, like, 50 — and she’s dating a little bit. And man, I just want to crawl into a hole and die,” Hartley joked. “I know it’s a natural thing, I know it’s a healthy thing. She’s wonderful, she’s sweet, she’s responsible, she’s great. She’s earned the trust.”

Justin Hartley (L) and daughter Bella.Justin Hartley/ Instagram

Justin Hartley

Justin Hartley (L) and Jimmy Fallon.

The Tonight Show Starring Jimmy Fallon - Season 7

“There hasn’t been one guy [where you’ve said], ‘Okay, maybe he’s cool’?” asked Fallon, 45, who’s a dad himself to two daughters: 4½-year-oldFrances Coleand her big sisterWinnie Rose, 6.

“Well, uh, no,” Hartley responded flatly, the audience laughing. “Not even close, man. Not even close.”

“I have yet to meet, like,me, right?” he explained, joking, “When I meetme, that’s the guy.”

Justin Hartley

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Hartley has been open in the past about how his daughter has seemingly grown up so quickly, telling PEOPLE in August 2018 that he couldn’t believe he was aparent of a soon-to-be high school student.

“Unbelievable, right? It is a shock because I remember feeling like I woke up and she was 10. Then I looked at her again and she was 14,” the actor said at the time.

“She’s perfect. I got so lucky. She gets straight As, she’s kind to people, she’s nice, she listens to people. She has her own opinions about things, she’s motivated, she’s driven, she’s smart,” Hartley raved proudly.

“She’sgot pretty much everything. I don’t know where she got it but she definitely has it and we’re very proud,” continued the star, who added that Bella “watches every episode” of her dad’s show.

This Is Usairs Tuesdays at 9 p.m. ET/8 p.m. CT on NBC.

source: people.com