I may not be the person to answer your question, but I'll try. lol Showing emotion is a powerful tool and being able to write lyrics that do so, is a challenging task. But maybe you just need to sit down and think about exactly what you want your audience to feel? Be descriptive, use powerful words, and use a thesaurus!! Exampllleeeeee: "I found you" doesn't sound as good as "I found the one that slowly takes my breath away and will always be forever one in a million."
But don't take me seriously I'm not a lyricist, but I do think what I told you is just some common knowledge~ Good luck!! lol