You think Nima pulls away because he doesn't care.
Nima's scores say something else: under tension he needs distance to calm down, and on calm days the same person sits closer to you than you do to him. His distance isn't indifference; it's how he settles.
A cycle that belongs to neither of you.
The more you push to talk, the more Nima pulls back; the further he pulls back, the more anxious you get. Neither of you is to blame. It's a dance you learned together, and it can change.
This week's step: a pause, with a time to come back.
Next time things heat up, Nima can say: “I need twenty minutes; I'll be back at nine.” He gets his space, and you know when he'll return. That one sentence breaks the cycle.