Dating rumors about Selena Gomez and Zedd have been buzzing since she broke up with Justin Bieber. The singer and the EDM DJ worked together on a single, "I Want You To Know," and have continued to hang out even after its release.

While the two had previously gushed about each other during numerous interviews adding fuel to the fire, is their relationship already heading downhill?

Breakup rumors have already started rounding about Gomez and Zedd, while other sources claim that the two are still together. However, after the "Heart Wants What It Wants" singer recently "liked" one of Justin Bieber's Instagram videos, the producer allegedly gave her an ultimatum.

Zedd is apparently becoming fed up with Gomez's "games" with Bieber and wants her to completely cut her ex-boyfriend out of her life, otherwise he is done with her.

"The liking of the Instagram is just a shot at Zedd because he is all about his album and work and not focusing all of his attention on her. Zedd has realized he really hates these childish games she is playing and is really getting over her," said a source to Hollywood Life.

"Zedd doesn't want to be a tabloid guy, he wants to be an artist and the games Selena plays puts her in the news all the time. He has given her an ultimatum, lose Justin or lose him."

Previous reports stated that Zedd ended things with Gomez because of her "high-maintenance attitude and needy nature."

"She'd call him all the time and get upset if he didn't drop everything and answer. Zedd is tired of dealing with the drama," said a source. "Zedd was supposed to go out to Georgia last week to visit her, but he had to cancel because of a gig. Selena flipped out, and they had a huge fight. He's been avoiding her calls ever since."

Although neither of them have ever confirmed their relationship, we hope that Gomez doesn't go running back to Bieber.

Gomez recently expressed that that not only does Zedd have "beautiful eyes," but thinks he would make a great husband and father.

"Selena definitely wants to have kids one day," said a source to Hollywood Life. "She thinks Zedd is marriage material and perfect dad material. They've talked about kids and both of them want a big family."