I once saw a film where a boy meets a girl, they meet at some kind of school dance but I think the boy is a convict or something. At some point they get it on in a house and there are loads of candles all around them. At another point the boy is running through the woods and he sees the girl floating in a pond full of lilies photographing herself. The police are chasing after the boy so they run away to live on a mountain somewhere. The police find them and turn up in a helicopter but they manage to escape by jumping over a waterfall. Possibly.
I think its at least 10 years old. And its probably not British.
Any ideas?