That seals it in my mind.
Can't help but think in the long run he'll regret letting a 16-17 year old girl drive his decision, but I do think that's a big factor.
That's what best friends are supposed to be there for. Not a failure of KJ & Gebbia if DH picks his GF, maybe they're one of the few couples who can make it last. But, in general, that seems less likely than him picking NU tomorrow.
I tried talking my best friend out of thinking his sweetheart was his best choice for the future, he didn't listen, it derailed his opportunities after hs, and now she has a family with another guy... Another of my best friends is happily married to his high school sweetheart, with 2 kids.... It always seems unlikely, but ya never know if you don't try, life is weird... Good friends at least try to point that stuff out tho.