Seeking advice for romantic getaway

My boyfriend and I have been together for 5 years and have never gone on a nice trip. We finally have stable jobs and are looking to treat ourselves for once!

The Caribbean is high on our list, but where to begin? There’s obviously so many unique places to visit, it’s a little overwhelming!

What we are looking for is a quiet beach with nice sand and clear water to swim all day. I’d also like to feel like there’s an actual real population on the island, not just resorts and nothing else. I’d like to be able to go buy ourselves some food to cook at our place and also be able to go out to restaurants in town.

Not at all required but a bonus would be a place with roads so we can rent a scooter and drive around! And I don’t mind if it’s a flight or two, plus a ferry potentially, to get somewhere that will fit the vibe we are looking for. But if it’s easy to get to from Vancouver Canada that’s a bonus!

Any ideas?!? Thank you in advance!