Lyric discussion by WhatWouldJeffDo 

Cover art for Have Faith in Me lyrics by A Day to Remember

Yeah, I see it as a guy who really cares about this girl and he promises he'll always be there for her. And shes going through really hard times in her life so he's reminding her and telling her that he is right there beside her every step of the way to help in anyway and every way possible and that she won't ever be alone because he'll always be there for her.