It's Always Been You: An Aces in Love Romantic Comedy - Aces in Love, #3

Twenty-six-year-old Courtney Davenport is loud, fun, and always the heart of a party. She's also asexual and runs a talking service for other aces who are worried about coming out. But when her sworn enemy Sophie Sway phones the helpline, Courtney is thrown. Courtney and Sophie have been enemies forever. Growing up at an expensive boarding school that pitted them against each other has ensured their rivalry lasted way beyond graduation.
And now Sophie's not just coming out to her--unknowing that it is Courtney at the end of the line--but worse! In the coincidence of the century, Sophie's also moving next door. Furious, Courtney decides to do everything in her power to make Sophie think her new apartment is haunted, so she'll move away. But the more time Courtney spends around Sophie, the more she begins to question her feelings about her.
After all, love is a small step away from hate. It's Always Been You is a f/f, enemies-to-lovers asexual romance featuring a billionaire, a runaway horse, and too many elephant stickers.