Haha

All he's done is ignore him for a few days. He's not doing it to be spiteful, but in order to protect himself from his trauma, and give him some time to decide what he wants to do. They have known each other as Jiwon & Dong-gyun for only a few weeks, so in reality they are still strangers to each other. After a few days, Jiwon then clings to DG as if his life depended on it, so it turns out okay for DG in the end (seeing as he's so smitten about "Alex').