How do I keep my identity separate from my job?

You have found a steady place: you give yourself fully to the work without confusing it for who you are. So if the role vanished tomorrow, you would still be someone. That is not detachment or half-effort. It is freedom. You can pour into the job precisely because you are not gambling your whole self on it. That freedom is worth guarding, because the pull toward fusion is quiet and constant. Success, praise, and long hours all whisper that you and the role are one. You know better, but knowing has to be renewed. Keep noticing where the job ends and you begin. Keep tending the parts of your life that have nothing to do with work: the people, the interests, the quiet person you are on a day off. Those are not distractions from your career. They are the ground you stand on that lets the career be a thing you do, not the thing that holds you up.