She chased after me. She was convinced I really loved her and that I could fight the curse. And I did. I never laid a hand on her. I overcame the Archer’s curse. But it didn’t matter, because as soon as I kissed her, she died.” Jacks’s mouth twisted bitterly. “Since then, every girl I’ve kissed has died, except for one. And you are not that girl.”
MY belief is that Tella WAS dying and Julian’s blood healed her somehow and that because she passed up Jacks’s love on top of that, that Evie is his one true love i don't think his heart would beat as hard when Evie is around if that weren't the case