My Book In Progress !

So I am writing a book and some feedback would be great! It's called "Daniel's Demise", And is fiction/fantasy. It's about this girl who moves to England and she sees this boy she really wants to talk to but everybody keeps telling her that she'd be wasting her time because he's never spoken before. She tries anyway and at first he ignores her but eventually he finally speaks to her and they become Best friends and he saves her life, then on her 15th birthday he promises to make her 16th birthday special (he's going to tell her he's an angel) but then their friends start dying one by one because they come too close to figuring it out. So he does something to protect her and it leads to the second book. I've been working on this for almost 2 years now and writing means the world to me, so just leave some comments letting me know what you think. Thanks :)