You know how, when something happens to you but not to that someone you love. Unfortunately, extremely unfortunately, that something isn't exactly positive or enriching, and it really affected you (probably ate half your heart). And because of that, you function so differently from that one you love. You're probably so much more vulnerable, that his heart breaks on stone while yours shatters on sand. So you spend so much time piecing those fragments back together. Nonetheless, you recognize the embarrassment and darkness of this fragility and you try to hide this ugly side from he/she and probably the entire human race. But mending is tedious, and a little tormenting at times. So it wears you out, and being so very human, you do whatever it takes to guard your poor little pathetic heart. You don your entire armor, to prevent heart from getting blown and shattered again by a mere breeze. Then the one you love starts questioning your armor and your defenses, and you get so upset because you wonder why he/she can't see the pieces of heart you're trying so hard to protect behind your armor. But that's probably because your armor's opaque and you're probably too afraid to shine a torch and look at the pieces yourself. So you shut your eyes and use your doubled edged sword, and slash, and pierce and swipe and pierce, anyone who comes near that yet-to-be-mended heart of yours.