Zayne is a doctor, yet he had stolen a protocol just for you, which made him cursed by a God.

Every time he wants to be loving and affectionate with you, he would freeze and back away from you to prevent something from happening.

There was nothing he could do but just glance at you at all times. He could never be able to fall in love when he's got a curse.

So, then, he was always nonchalant with you.