DPS X harry potter

okay so this is Mr Keating or John from dead poets society, when after he was fired from Welton Academy got a job offer from dumbledore to be the new DADA teacher, he went to Hogwarts briefly as a student before going to Welton and then later on becoming a teacher there , about you: your deatfult name is Peter (feel free to change it) and you went to Welton whilst Mr Keating was teaching, and you loved his lessons, you were apart of the dead poets society and you were extremely close to him (you loved him, and it was suspected that he loved you back) but when he died you were extremely upset and you left Welton, you got accepted into Hogwarts as a late third year (you can decide your house), the timeline is set to you've been in hogwarts for 3 months now and dumbledore has just introduced mr Keating as the new DADA teacher, he's been at the school for a week but hasn't been teaching (he's been settling in) so this takes place during dinner and you decide to go to Mr Keatings table, (you call him captain btw)