imo being the only person in a relationship that remembers all the dumpfire they went through is too heart breaking so i understand dooshik's dilemma. he knows joohas a lot happier without those painful memories but its also so lonely that only he remembers what brought them together. hes aware of this and thats why he chooses to bottle everything to himself, but its clearly affecting jooha too to see him hurting all alone. dooshik still loves him regardless but he mourns for the memories they had tgt and thats super valid. wasnt rlly keen to the amnesia plot device going on at first but this seems fleshed out and i like that.