Looking for a Love Triangle,Paranormal, Romance,Myth book.

You should read " Wings " series, it's realy good and matching your description.

Try the Mortal Instruments series.

Have you ever read the House of Night series? There is quite a few love triangles in there, practically all the characters are vampires, there's adventure, an interesting plotline and LOADS of romance.

Edenbrooke- It is a twisted love triangle between two twin sisters. It is the CUTEST romance book I've ever read. seriously my favorite book. I couldn't set it down. EVERY ROMANCE LOVER NEEDS TO READ THIS BOOK. it isn't a myth of fantasy book, but you seriously need to check it out.

The Hunger Games
Delirium
Twilight
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Percy Jackson