@Kellogg_J_Kellogg I love this - this kind of discussion really makes me so happy, because I really am trying to put all of these subtle indicators into the story, so it's so great that you are all picking them out and noticing them.
This is exactly what I wanted to do with the last chapter of part 1 - it's supposed to be a subtle "coming back to reality" moment. On the beach, to an extent, everybody could pretend that they were equal, just a crowd of teenagers hanging out with each other where their social standing doesn't mean all that much, but when they get home it's different. Evie grew up with very little, and a mother who didn't do much to bolster her self confidence. She doesn't really believe that she's anything special, she doesn't feel she deserves anything, and apart from being a good artist, she doesn't think she's worth that much. Jude is the opposite to her, and has always felt he was unique. He's beautiful, charismatic, interesting, what with his background growing up in another country, and from a wealthy family. He has a sense that he's "too good" for things. Too good for 'boring' or 'uncool' people, too good to stay in Ireland, and to an extent, maybe too good for Evie too. His mother's absolute disinterest in her, as someone who doesn't go to a private school and isn't from the city like they are was supposed to kind of reflect this. They have the same eyes - the judgement in them feels like it could be his.
There are loads of hints about his not-so-great character at this point, but as a teenager it's difficult to exist without taking on some feelings and opinions of your parents. He will have the chance to reflect on himself, maybe, and grow, but for now he can't really hide the kind of person that he is. The only trouble is that Evie is in love with him. Even if she sees him act out in front of her, she won't see it negatively. He tells his sister she's bad at playing the piano? Oh well, I guess he's just being silly. It's nice to see him play with her. He's constantly doing wrong, but she won't see it like that. Young people are often totally blinded by their feelings and what they want to see, rather than what really is.