Lost Mate

Rose was happy with her mate. They loved each other and trusted each other. But when Roses mate, also the pack warrior, has to chase down some rouges, he goes missing and is presumed dead. Rose is basically dead when she hears this but finds comfort in her best friends, the Alpha and Beta. With their help, she gets through the pain and they find him. But he has found another girl. How will Rose react? What will she do?