
spoilers:
the novel kinda implied jerome liked him since they first met. also jerome saying all those things in 25 are reflective of his own trauma, when (spoilers) he was basically sold to hugh's family and later forced to rape his nanny, who is the only one that cares about him. he is essentially telling him to not submit to the violence, tho twisted as his words are.

it's not really depicted as a love story (although they do love each other at the end), but yes they are trauma bonded. the novel repeated use the phrase "solidarity of hatred" to describe their bond, and "parasitic" for his relationship with the remaining boys (initially at least). it's complicated. spoilers:
at some point, bc mc couldnt move on from his experience with the boys, and the two remaining couldnt either, he tried to embrace them and love them. it was the only way he could survive in the world with them in it, bc when he tried to kill one of them (successfully), he immediately despaired and revived him and realized he couldnt live without them. but he also knew that their existence and his unrelenting hatred and trauma will drive him to kill himself eventually, so he chose to bury his hatred to survive (although this was temporary and didnt work). that's kinda the gist and doesnt take into account his relationship with Jerome
So you're saying that out of nowhere this motherf* cares about him. Go eat some shit, not even 365 days has this level of bullshit. This autor is needs to be admitted in a Psychiatric hospital.