He apologized and is respecting Suha's wishes of giving him space. He can't do anything more for his redemption right now because then it'd be "he is stalking Suha and wont leave him alone." They need to communicate properly and address their issues so Jiwoon can start his redemption properly. He clearly has mental problems, most likely depression especially if he is thinking death would be an option if he loses Suha. Since he didnt barge in, he clearly doesnt mean he wants to have Suha by force. He is hurting his own self with these depressive thoughts. :(
