Can't blame him , pilsang is right now affection hungry who never received one in his life , even though he knows shin will be married off he before leaving him wanna remember these moments as long as he can till the day come he has to leave , but i guess pilsang might leave when he will know "words and affection shin showed him was just a bet of fun" will be revealed by that doctor friend later on.

If you know he's getting married soon, you should leave immediately and not enjoy the present moment.