I was in your position 7 years ago, i.e. doing my 'A' levels, got my PPL and was wondering which path to take
ask yourself this "in the event that i do not become an airline pilot, what else would i want to do for a living for the rest my life instead?"
Persue that 'second favourite' career option (make it a feasible aim, not footballer or porn star for example) but keep focused on that pilot ambition and be ready if and when the opportunity arises.
happy flying
IFSD