spoilers for the novel!!
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I highly doubt he does bcs at one point in the novel he runs away and ends up homeless but taegyeom finds him and brings him back to haeyoung and ppl say it's bcs he felt bad for him bcs of what his condition looked like but I seriously doubt that if he's taking him right back to the problem that haewon ran away from in the first place. And also towards the end after being tortured immensely by haeyoung he goes and tries to kill himself by jumping off a cliff but haeyoung finds his body takes him to the hospital where he then wakes up and has amnesia so yea
I'm actually not sure I haven't actually read the novel (since the only thing i can find that had the novel only translated 4 chs) I've just heard spoilers from it but someone said he does but a lot have mentioned that he loses his memories and haeyoung pretty much takes care of him and that's the end so idk for sure if he does get his memories back

BULLSHIT DON'T GIVE IN TO THAT STOCKHOLM SYNDROME SHIT! HAE IN