J.S.
I haven't outgrown my nut or peanut allergies, but they haven't worsened dramatically either. My best friend's peanut allergy is just as anaphylactic as it was when we were children.
Three years ago her daughter tested as severely allergic to peanuts and a few other nuts. She tested again a month ago (9 years old now) and she's free and clear with no danger.
The fact is that you simply can't make any assumptions one way or another as to whether an allergy will be outgrown or not. For now, behave as if it's "forever" rather than short term. That's how all allergies ought to be treated anyway until confirmed otherwise.