Tf where did you see jooin using him? Jooin has never asked Cain for anything, and if Cain has treated jooin well then jooin has also treated Cain with kindness and it's very obvious that jooin only sees him as a friend. And right now, Jooin is just confused, he needs some time alone, but neither yahwi nor Cain gives him enough space. I can't blame Cain for having feelings for jooin, but it's not jooin's fault if he doesn't feel the same way towards him.
You're not wrong, that was just my opinion.
But it just feels that Jooin is kind of using him
Of course he wants to be friends with Cain however Jooin shouldn't have turned a blind eye when Cain kissed him cuz he's giving Cain false hope and in the end he will hurt Cain (if Jooin will choose to be in a relationship with Yahwi).
According to jooin's personality I think he's not the type who will go this low and use someone for his own reasons but anyway I respect your opinion.
I just can't anymore
Jooin has to choose someone and stop giving wrong signals to Cain
Its clear that Cain has a one sided crush and Jooin is using him just to forget about Yahwi
Cain deserves better