Responses

Even if he didn't, as we saw in the flashback he was at least physically touchy and kept his arm around them. Plus dating a couple times isn't a small thing both for the women being unfairly led on as well as Jin who has to handle the logistics like Hotel bookings (which implies he slept with them) and gift giving. It's emotional torture.
Fckng hate it when seme's whoring around but the uke's not and remains virgin let them do it with someone else too...