Green haired female main character with elemental powers

[J]

I read this book from around 2009 to 2016, when I found it in the high school library. I'm fairly certain the book I read was the second book in the series as there were plot points not explained. I also remember the cover have the words ice and fire on it (IT WAS NOT A SMUT BOOK, I KNOW THERE ARE LOTS UNDER THE TITLE ICE AND FIRE) The book was not old and seemed fairly new. The setting inside the book was fairly modern as well, city-based with no old tech or genre
The main character was a girl with green hair, though I only remember this because of a scene where she got really sick. She has an older brother who has the same colouring, I think they were a different race and he wanted to bring their race back by her marrying her old boyfriend (Not completely sure but they seemed to have history) it was kinda implied when she said how were they supposed to have pureblood kids when the other dude isn't the same race as theirs that her brother would give his genes.
I think there was something to do with a royal family where she and a blond guy (also elemental) would be working together. I remember the meeting at a bar or something because he put out a fire. there was a scene later on in the book where the blonde dude gets over his fear of water to either save her or jump in after something.

[Tab]

Ice Like Fire ?

Do you remember the cover?

[J]

Not that, but it looks interesting. the main character of the one I'm thinking of has green hair.
I'm not sure if I've just subconsciously thought it, but I think it had fire and ice on it

[Amy]

I remember this book! Unfortunately the reason I found this post is because I am also looking for what it is called. I realise it's been a while but did you have any luck with the title?