Nick Lachey and Vanessa Minnillo have been dating for what seems like a celebrity eternity – about two years. Minnillo has long been reported to be nearly desperate to marry Lachey, especially since the pair moved in together last year. Accounts that she’s putting pressure on Lachey are heating up – but Nick is said not to be interested, at least for the time being. There are also a lot of stories floating around about Minnillo’s immature behavior, comparing her to a high school drama queen. Lachey has generally been portrayed as a pretty mature, sensible guy, and they seem mismatched in a lot of ways.

Nick Lachey and girlfriend Vanessa Minnillo are on the verge of splitting. The couple has been trapped in a break up-to-make up cycle, and now Nick is fed up with Vanessa constantly pressuring him to marry and give her children. And he came unglued with the former MTV host accused him of still being in love with ex-wife Jessica Simpson, pals reveal.

Their problems were on public display March 25 at the trendy restaurant Katsuya when they “sat in stone silence for more than 30 minutes after having what appeared to be an argument,” according to an eyewitness. “As they left that night, Vanessa was in tears sitting next to Nick who was gripping the steering wheel of the car.”

Three nights earlier, at a birthday bash for basketball star Baron Davis at the Stone Rose Lounge. Vanessa “had a good bit to drink, and she turned into a bitchy high school drama queen,” said an eyewitness. “She was rude to some people and then flirted with a bunch of athletes, partying like a single girl. She was hanging all over other guys. Vanessa was rude to fans who wanted her autograph. She spent half the evening sneering at other female guests. From what I saw, it’s not wonder Nick is sick of her.”

[From the National Enquirer, April 14th 2008 print edition]

The Enquirer goes on to talk about how desperate Minnillo is to “get a ring on her finger” and “have Nick’s babies.” I get really tired of the way they portray women as thinking about nothing but marriage and babies… but to be fair, that seems to be most of what you hear about in Minnillo’s case. Whatever career she had as an MTV VJ has totally died out, and her acting career hasn’t exactly taken off. The only thing she’s notable for anymore is dating Nick. Given all that, it makes sense that she’s pressuring him into marriage – what else has she got to focus on? According to the Enquirer, Nick is not giving in. He’s not in love with ex-wife Jessica Simpson anymore, but he’s still stung by their divorce, and remarriage is the last thing on his mind right now. Something tells me one of them will be giving the other an ultimatum pretty soon.

Here’s Nick Lachey and Vanessa Minnillo at Vanessa’s Birthday Celebration at Lax Nightclub in Las Vegas on November 17th. Images thanks to PR Photos.