^^ I agree.
You weren't telling him what to do with his life (as if he'd listen anyway, if you were); you were only saying what works for you. It's not saying you're superior as much as it's saying you're ethical. You might even have done him a favor by it and made him think some more about it, perhaps have him look inward a bit and come to terms with his choices, who knows? But you can hold your head high knowing you did what's right for YOU. Good for you. You don't owe him anything.