The clip released Thursday, features Nikki getting back into the dating scene following her high-profile split from Cena.
"It's confusing because I'm still in love with him," Nikki says during a conversation with her sister Brie Bella.
Nikki is also featured going on a date with former Bachelorette contestant Peter Kraus. "I haven't kissed another guy in nine years," she says to the reality star as he prepares to kiss Nikki.
Other moments from the teaser include Nikki and Brie making a WWE comeback and the pair feuding with Ronda Rousey. Nikki battled Rousey in October at the main event of Evolution, WWE's first-ever all-women pay-per-view event.
Nikki and Cena officially parted ways in July. Nikki, in October, stated that she did not want the breakup to define her career.
Total Bellas Season 4 is set to premiere on E! on Jan. 13.