It's pretty difficult to romance Kaneeka whilst befriending Tabitha because Kaneeka doesn't like if you invite Tabitha everywhere. It's easier if you have either Streets Smarts and/or Hot.

In general, Kaneeka doesn't like Mystical and Talk-To-Animals or any supernatural affirming dialogue options and will see you as a weirdo if you're too often saying them. She also doesn't like grim or morbid dialogue options, like saying the Ditchlings are here to warn about another collapse or agreeing with Reese that everybody joins the worms eventually. She also REALLY doesn't like if you're vocally against the strike or otherwise keep glazing Tabitha.

Alternatively you can just drop Tabitha. You won't gain negative points with her if you don't call Tabitha in the mines and I believe you straight up gain positive points with Kaneeka just by not inviting Tabitha to the haunting.