What should I call my book?

How is my story Plot: 4 tribes; air, water, fire and earth. Fire and water are long enemies. Brianna, An 18 year old girl from the water tribe meets a fire bender called Adrian. Brianna is one of the few water benders that have complete control over her powers, and she can make herself go into a trance, like meditating, to do things like summon water from air. When her mum and dad go away, She goes out exploring the mountains she meets a Blue eyed, black haired boy (who is also exploring), from the fire tribe. He has fire bending, but can hardly control it: for example, if he had sudden anger, he might set something on fire. She lives on the snowy part of the mountain, and he lives on the desert part. They meet in the no-mans-land, by accident. They form a friendship (unaware of the prejuse between the tribes), and they show each other what they can do. Adrian tells Bree his deepest secret; he can’t control his powers, and he is ashamed about it. So Bree teaches him how to relax and go into a trance, and he is soon able to have a bit of control over his ability. He teaches her how to control fire, and she teaches him how to control water. He is so great full, and he kisses her. Bree tells her blonde haired friend, Jade, who tells her off and forbade her to meet him again (as she is very jealous), letting slip the tribes hatred for one another. Bree is unable to do so, (as she has started to love him), she tells him what has happened. Adrian is shocked, and he asks his father why he never told his son about the hatred between the tribes. The father realises that his son has a love for someone that is forbidden, and tells the leaders of the tribe. The leaders keep Adrian away from the Bree, using force. He is heartbroken, and he loses control of his fire ability. He is then locked up in chains. She waits for days in the mountains, but he never shows up, as he is locked up. She is heartbroken, thinking that he was just using her. She packs her bag and leaves, going into the ice waste land, as she just wants to be alone. She still loves him, and she uses her new-found fire ability to keep her warm at night, refusing to use her own ability (water bending), as she thinks that if she uses the fire then it symbolises that she still loves him. She walks to the edge of the ice land, near the sea, and pitches her tent there. Meanwhile, her disappearance rumours reach the fire tribe. The rumours get exaggerated (she has disappeared because she was murdered) and it reaches him in prison. He is very upset.