Uh-oh. Are Harry Styles and Taylor Swift becoming awkward again? Though Styles and Swift had become friends again in 2014, things seemed tense between the exes when he came up to her and her friends in the lobby of the Sunset Marquis on Wednesday night. So what happened in the last few months to make Swift so icy?

In TMZ’s video, Swift, 25, completely avoided making eye contact with Styles, 20, and kept checking her phone. It didn’t look like the two even said a word to each other. From all accounts, the exes were on good terms and were even hanging out again. So what's up? Did Styles blow Swift off? Or was she hoping they could take their relationship to the next level?

Taylor Swift, Ed Sheeran and Harry Styles Ed Sheeran got Taylor Swift and Harry Styles to pose together at the 2013 VMAs.

We know that’s probably not in the cards since Styles has been linked to Victoria’s Secret model Nadine Leopold. The two met through Leopold’s CAA agent Jeff Azoff and hit it off, stepping out for the first time in November.

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He even “planned a few activities,” for Leopold’s birthday and they’ve been “spending lots of time together.” They got dinner at Craig’s in West Hollywood on Jan. 6, and then celebrated her birthday at Rande Gerber’s Café Habana the next day. That sounds serious! While they may not be exclusive, a source did tell Us that things were heating up between the two of them.

Harry Styles Dating Nadine Leopold Harry Styles dated Taylor Swift and Kendall Jenner in the winter, so it was only a matter of time before rumors cropped up about a possible new December romance. This year, the lady in question is model Nadine Leopold. Styles and Leopold have hung out at least twice, and they just went out on a coffee date in NYC this past week. But that doesn't necessarily mean Leopold is his new girlfriend.

So what was Swift so upset about? Styles and Swift had a famously rocky relationship. Following their split, Swift authorized a source to talk about her relationship with Vanity Fair’s Nancy Jo Sales. In the beginning, Styles “wore her down,” the source explained. “He was all, like, ‘You’re amazing – I want to be with you. I want to do this.” But things quickly went south.

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Though they only dated for a few months, from October 2012 to January 2013, emotions ran high. They split after Swift left their vacation early amid rumors that Styles had cheated. And things got pretty icy from there. Swift even used the split as inspiration for her critically acclaimed album 1989. The songs “Out of the Woods” and the aptly-named “Style” are both reportedly about the One Direction member. And no one can forget her hit song “I Knew You Were Trouble.”

Taylor Swift Taylor Swift and Harry Styles were recently seen getting drinks following the Victoria's Secret Fashion Show.

But in recent months, it seemed like Styles and Swift had gotten over their bitter split and the two had rekindled their friendship. Swift was even “bragging to her trainer and celeb friends that she and Harry are talking again,” according to a said.

RELATED: Taylor Swift And Harry Styles Were Friends Again!

The two were talking more a few months ago. They were seen grabbing drinks together and going to a 1975 concert in November. “I was on the floor and I saw them in what I believe was a VIP section,” a witness said. “They were both dressed in black and they were very friendly towards each other. I believe they went backstage at some point. To me they seemed like friends. … I’d say somewhere in between.” And rumors quickly started swirling that the two could start dating again.

So what was with the awkwardness? Was Swift upset with Styles? Let us know your take in the comments section below!