Basically, this is the busser that James was interested in when he was at Tati's birthday dinner. After being encouraged by his sister to DM James, Sam reached out. According to Sam's video, they met up and made out. But, Sam is not gay and uninterested in James, so they had a falling out. Watch a full explainer here.
The texts are blurry so here's what they say:
Sam: Lol it's Sam the busser from John Howie
James: How are you hahaha. Sorry about last night, you're very very attractive lmao
Sam: It's all good, very flattering actually
James: Love that. Did not think you were 19. I am too