@hellohannah2 I'm a people pleaser myself and when I find myself in these types of situations I'm always asking myself what did I do wrong. I can relate to Evie becoming fixated on a broken relationship feeling like she has to figure out why she caused the other person to walk away. We can't see that sometimes it's not us that is wrong, it's them.
The best solution to their relationship would have been from message one after he left for Berlin, clearly say that you want to stay in touch but that it cannot be anything more than friendship. Clearly define the relationship and the boundaries. As a teenage boy he has no clue that relationships have layers and complexities and need to be evaluated and redefined from time to time. In Evie's relationship with Jude, if I was her, I would want him to break my heart now. Prolonging the relationship and contact while not defining what is and isn't possible just makes the heart break worse. Sure, I'm going to be distraught, I'm going to cry my eyes out, and possibly ruin a girlfriend's blouse from using her shoulder to cry on, but I will heal faster and move on quicker if he doesn't drag things out.