I waited for Taei and Ilay to reunite but... Oh well I guess i needed more few chapters for that to happen
Spoilerrrrr
Here me out! Based on the raws chapter 106, the mc is acting like that because he wants to trap the spirit of salvation with the uncle of Eunhan once and for all. Before that he needs to provoke the spirit of salvation so that it will come out. Sorry for the spoiler
Just leave him bruh. If he keeps denying you then do what he wants. He will go and find you one day eventually (ノಠ益ಠ)ノ彡┻━┻