definitely, oz isn't much of a talker so there's plenty of writing to be had. but basically they were stupid 14/15 year olds. started dating in late 4th year, it kept going on through 5th year until right before the end of the year when she was in the great hall sitting with him and he just said "you know what? we're done." and basically got up and left and they didn't talk for a year. she's one of the FEW people who know his mom is suffering from a blood malediction, but... again 14/15, and she wanted more attention than he could give or was comfortable giving. he's a pretty laid back person all things considered and she was needy and demanding and it didn't sit well with him and a lot of it was his fault too. he totally could have made more time for her, but he didn't. and since he's kind of an outcast, and i'm imagining her more popular, that kind of fed into it all too. like he didn't want to hang out with her friends and he didn't want to sit at the table and listen to bullshit gossip all day because he's 200% a mama's boy and with her dying that's basically all he's ever focused on.