According to a new report from HollywoodLife.com, Ariana and Big Sean may have had some trust issues that drove a wedge between them. A source told the site, "A lot of the problems between Ariana and Sean came down to trust. At the end of the day, they didn't really trust each other."
The insider added that Ariana was a bit frustrated with his lifestyle, saying, "He is very smooth and Ariana saw how girls responded to him, basically throwing themselves at him. He never seemed to push them away as quickly as Ariana would have liked."
The source also pointed to "suspicious texts" that Ariana saw on his phone, explaining, "He always had an excuse, but these things add up."
According to the insider, Sean could also "get very jealous" and Ariana having close guy friends "was hard for Sean to take."
Rumors swirled that Justin Bieber may have broken Ariana and Big Sean up, with the insider explaining, "Sean did not like it [Justin's handsy performance with Ari]. He is not cool with another man grinding up on his girl even if it's for a performance."
Meanwhile, a source tells E! News that their busy schedules were to blame for the split, saying, "It hasn't been easy though with both of their busy schedules lately and they know its going to get even harder in the next few months. This was really difficult for them to publicly call it quits but they thought it would be better this way so people know there is no bad blood between them at all."
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Gallery | Coupled Up: Ariana Grande and Big Sean