They have to be dating. On the birthday stories there was a pic of both of them young and he said he had a crush on her since forever. When she locked herself in her bedroom past midnight it was him who came to her rescue. She rode with him to some party/wedding or something. There was that whole cringe vid on her birthday celebration post of her taking something from his torso and then kissing him on the lips. At dinner with just Guy and Jack, she was sat with Jack.
I’m sure there’s been other stuff but I don’t look at her stuff regularly to know.