Teenage Lust or Lifetime Love

Basically, it's a Frerard when they're teenagers. It's the first time I've written as if they were young so I'm quite looking forward to it.
It's also the first time I've written in a narrative voice so this should be interesting.

Both boys are gay, eventually quite openly.
They have been best friends for as long as either of them can remember, but they're relationship is about to develop and neither one knows if they're ready for it.
Will their relationship be just teenage lust? Or will be a lifetime love?