I'd use the subjunctive in if it were me, as the character did, because it's an assertion contrary to fact. I'd also follow it with the conditional would.
Some grammarians still try to convince Anglophones that English has no disjunctive pronoun and they should say if it were I. Practically nobody actually says that, though, which provides said grammarians lots of satisfying teeth-gnashing.
Student or Learner