Honestly though every time John talks about how “oh I guess we’re meant to be together” Hussie makes a point of him being noticeably uncomfortable and unsure about it. So all I’m sayin is that John probably never actually wanted to be with Rose or ever thought of her in that way, he was just pulling a normal John and assuming karkat knew what he was talking about against his better judgements. Maybe less so with Roxy but tbh I can’t see him being anything but super happy for her and somewhat relieved when he finds out she’s with Callie and Jane. Idk I always saw John as very aromantic (and probs ace) and I think there’s a good amount of in-canon evidence for it. I can definitely relate to his feelings of thinking he’s supposed to be in love with someone cause of their situation regardless of his actual feelings.
If you watch Jane the Virgin, what are your thoughts on what's going on with Rafael and Petra?