Destined Mates

Paul and Emma were just friends, friends with benefits. But when Emma started to ask for more from Paul, he pushed her away. It wasn't because Paul didn't care about her. It was because he thought she deserved better than him. She deserved to be with another shifter, not a vampire like him.
Emma then found out the vampires were in mortal danger, but how would she convince them that she was telling the truth with the relationship between Paul and her damaged? Would she be able to help them at all? This can be read as a stand-alone or part of a series.