An obsessive love

One word is all it would take. I made this cage of glass. One word from you my dear, And it will shatter. Each step away you take from me, In my heart you become dearer; Everytime I look in the mirror, All I see is you. You are intoxicating, I'm infatuated. You take a step back, I take a step closer. If you run, I'll chase you, If you hide, I'll find you. You're the mouse. I'm the cat; I love you my dear, Please always stay near.