The werewolf I understand entirely. They’re both awkward, horny kids trying to find their place. The century old vampire creeping on a teenager is where it gets weird.
The werewolf "imprints" on Bella's unborn vampire baby later in the series, so fortunately the scales of creepiness end up balanced between Team Edward and Team Jacob.
I read them alongside a friend and met up for coffee to discuss after; we devoured them as they came out and about ¾ of the way through the final book we both just said "What the fuck are we reading?"
I always assumed vampires are sort of stuck their age mentally as well, for the most part. They can get more wisdom and knowledge but emotionally and sexually they're whatever age they got turned in. So a 200 year old vampire that got turned at 17 is basically a 17 year old in that way.
it's not his FAULT your honor he couldn't HELP but form a love bond with an unborn vampire baby your honor you'd understand if you were a werewolf your honor