OH MY GODS MUTANT ANKLE BRACELET! Oh gods Frankle sounds like a mutant ankle bracelet... No offense guys.

But yeah, even though Hazels like a gazillion and a half years older than Frank, and Franks life depends on a gods dang stick... They both have huge problems, making them a stronger couple. I mean, c'mon, you don't trust some random girl with your lifeline, and you don't take some random guy to die with you.

Frankle now, Frankle tomorrow, Frankle forever.

Answer: Ship it.