For Both Are Infinite (Hearts in London #1)
Stephanie Alba

She set some rules for herself: no connections, no love, no friends.
Work would be her only solace.
But when she's assigned to train Rhys Edwards, Britain's heartthrob, for his run as Hamlet on West End, all her plans fade away. Ellie soon realizes that just because you're breathing, it doesn't mean you're alive, and she learns it's the connections in life that make it worth living.