Aria Screenshotting Caleb's Likes is a LOT more Unhinged than Him Liking Her Stories

Caleb was the perfect gentleman the entire time. He was respectful of both women and made it clear it was platonic. Calling their whole relationship fake was complete projection and way off base. He was literally being loyal to Mariah during the whole experiment.

So he liked some of her pics? WHO CARES? This is completely normal.

But why the hell was Aria obsessively following his activity to even know he blocked her briefly and take a screenshot? WTH is wrong with her?

EDIT: Some people are saying Mariah and Caleb had an agreement that he would cut off all contact. THIS WAS NEVER SAID IN THE REUNION.