During Egypt you began to think little about yourself, constantly hating who you were and even thinking you were just an undeserving, loser of a person and of course, getting distant. But Jotaro caught on sooner than later, as he does notice small details especially when it's you,

"I'm not one to notice the small details," he lies "but, you've been getting gloomy so stop it. It's annoying"

And now you and the group are in a hotel for the day, after useless attempts to find Dio, Jotaro decided to chat with you in your shared room as the rest drank or talked in the other room.