Vince Vaughn and Kyla Weber have been engaged since March, and ever since their announcement, it seems like Vince has been trying to sabotage their relationship. Vince likes to have his cake and eat it too – and the man loves his cake, judging from his bloated figure. He wants to only hang out with his guy friends, tour every bar in America (and then some), flirt with the chicas, and come home to his doting mother, all while maintaining his “relationship” with Kyla. But Vince wants us to know – in time for his new film Couples Retreat – that he’s finally ready, at the age of 39, to settle down. Yes, it seems Vince is experiencing “the first time” he ever felt like being a dad. But is he ready to actually settle down with one woman, and not the neverending stream of bar-girls and college students?

Vince Vaughn swings no more.

Now engaged to Canadian real estate agent Kyla Weber, Vaughn, 39, says he wants to start a family and settle down.

The funny guy even says he’s ready for diaper duty. “It’s the first time that I really want to have kids,” he told PEOPLE while promoting his new comedy Couples Retreat.

“I’ve been very fortunate in my career, and my life has been about that for so long that you get bored of it. You’re ready for your life to be about other people and other things,” Vaughn said.

While filming the movie – costarring his longtime pal Jon Favreau and directed by another friend, Peter Billingsley – Vaughn spent time in exotic Bora Bora with his soon-to-be wife and members of his family. “We had a lot of fun, which was good, and my sister was there and my nephew was there,” he says.

And his buddies have given their approval.

“I’m very happy for Vince. He’s marrying an amazing girl,” says Billingsley, the former child star of A Christmas Story. “It’s a natural cycle of life that we all go in.”

But Billingsley admits one thing is dramatically different from the days when Vaughn and Favreau – who starred in the 1996 Swingers – were making the Hollywood scene.

“The parties are a lot different than they used to be – that’s for sure!” Billingsley says. “I still come with the point of view to have a great time, but it’s kids and strollers and babies and clowns.”

[From People]

Maybe he has changed and I’m just giving the guy a hard time. Could be. It’s just that Vince incites a bit of rage in me. I used to love the big lug, many, many years ago. But now I look at him and I just think he’s pissed away his talent and he’s pissed away his good looks. Maybe he’s happy doing comedies – obviously, there’s a lot of money there. But he was once a really good actor, and now it feels like he only gets the “buffoon” roles. As for his personal life, I think Vince, much like George Clooney, has started looking around the room at his friends, and he’s just realized he’s the last unmarried guy, the only guy without kids. My guess is that he wants to get married and be a dad because he thinks he’s at that age, but really he still wants to hang out in bars and be skeevy.

The other night, Vince appeared on Jay Leno’s show for a short interview to promote Couples Retreat. Jay made him do the segment “Earn Your Plug”. Jay made Vince workout with 95-year-old Jack LaLanne. LaLanne made Vince do dips in a chair, which Vince did with little effort and good humor. After Vince finished, he gave LaLanne a big kiss, which was really sweet.

Vince Vaughn is shown outside of Madeo after dinner with Kyla on 8/22/09, credit: Fame, and on 8/23/09 at Dodger Stadium, credit: Jill Weisleder/LA Dodgers