Harry Styles
Harry Styles is avoiding his friends to spend more time with Nadine Leopold. Getty

One Direction star Harry Styles is reportedly avoiding his friends to spend more time with rumoured girlfriend, Victoria's Secret model Nadine Leopold.

According to a report in Hollywood Life, Styles, who recently celebrated his 21st birthday with Leopold is getting serious about their relationship.

"Harry goes on and on about how funny Nadine is, how smart she is, how cool she is — he's got her way up on a pedestal. He's non-stop, to the point that it's annoying to a lot of his friends. And he blows off plans with his friends for her, which he's never done before," a source said.

"People have been making fun of him over it, calling him whipped. Harry doesn't care — he's never been bothered by what other people think. He does what he wants and right now, Nadine seems to be all he wants," the insider added.

The pair first met in November last year through the Austrian model's CAA agent Jeff Azoff, and were pictured on a series of dates before Christmas, sparking rumours that they are more than just close friends.

It was recently reported that the British boy band member got Leopold's initials inked on his body.

Meanwhile, Styles, who has a history of dating high-profile celebrities including Taylor Swift and Kendall Jenner, was spotted with Leopold at the Go Greek frozen yogurt bar in Beverly Hills on 22 January.

"Harry and Nadine came in together and tried a couple of samples before making their order. Harry had a medium sized frozen yogurt with strawberries and bananas and his friend had the same, but with pineapple and toasted coconut on top. He gave her a bite of his with his spoon and she did the same to him. They seemed cute together. Flirty, like a couple," an eyewitness told the website.