Mariah Carey Previews Fiery New Song 'I Don't' About James Packer Split

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Mariah Carey is expressing her feelings through her music.

The 46-year-old singer shared a snippet of her new song "I Don't" on Sunday, a song she revealed was inspired by her breakup from billionaire businessman James Packer during the finale of her docu-series, Mariah's World.

"Said you would always be mine, feeding me nothing but lines," Carey sings on the ballad. "But I'm tired of crying, no more tears, cold at night because you're not here, leaving you was my worst fear.... I was caught up, I was blind. You kept playing with my mind."

WATCH: Bryan Tanaka Finally Confronts Mariah Carey About James Packer

"'Cause when you love someone, you just don't treat them bad, you messed up all we had," she continues in the chorus. "Probably think I'm coming back, but I don't, I don't."

During Sunday's finale of Mariah's World, Carey talks to her manager, Stella Bulochnikov, about her relationship issues with ex-fiance Packer. "I know that you've been trying to help me figure it out, and I think we both need to just cut the sh*t and recognize the fact that the two of us know why I can't go through with this," she said. "I can't do it. How can I do this?"

"Ever since the tour wrapped I took some time just to process my feelings and I started writing a song to express what I’ve been going through," she also said about her new song. "And if you're not getting the love that you need from someone that you're supposed to be in a real relationship with, then why remain in that situation?"

WATCH: Mariah Carey Convinces Bryan Tanaka to Stay on Tour With Sexy Lap Dance

Of course, the episode also saw her relationship with dancer Bryan Tanaka heat up. The two kissed on the beach, and during a confessional, Carey said she was "really happy."

"Not sure if anyone else can understand that, but it is what it is," she said.

Watch below: