I think I read this as an eBook in the last five years, checked out from the library, and the memories are far more fleeting than I was expecting. Bits that I recall:
- She was saved from dying by the angel. I don't remember if it was because she wasn't supposed to die yet, or because he'd fallen for her. I think she actually died and he brought her back. I want to say that it involved a truck hitting her.
- She was already orphaned, I think living with her grandparents.
- The angel had recently shown up as a transfer student at the school, and I'm pretty sure there were descriptions by the narrator of his flawless beauty and how all of the girls were already after him.
- I think the book was set in the Southwest, with descriptions of the landscape often involving talking about the bare rock and the heat.
- The second boy is known as a troublemaker in school, prone to fights and truancy. I think she learns that it's because he awoke to his heritage as a mystical protector. Around the time she learns this, she also finds out that he lives on his own in his house, although that's not common knowledge.
- There's a plot point where one of the teachers at her school (the principal?) recognizes the angel due to him being involved in an accident involving the teacher's sister when they were younger. There might have been an old photo that made the resemblance unmistakable.
- There was, of course, a love triangle, with her being drawn to both of the boys, both of whom insisted that the other was dangerous, and no good for her.
- They were all about high-school age; can't remember ethnicity.
- I don't remember any sex involved in the plot, and the violence I remember was non-graphic.