[Harry Potter] Severus, I'll Be Your Shadow Guard

Sev, would you choose me or Lily? Lily... Fine. I'll give up. Professor, would you choose me or Lily? I won't choose either of you... My Lord, would you choose me or Lily? You... But you no longer have the right to choose. Sev, you said your life could only be a tragedy, so I decided to save you from it, because I know the despair of living in darkness. Sev, you said Lily was your only sunshine. You are my sunshine too, but you so grudgingly leave me to live only in the darkness you give me. Sev, you met her when you were six, and I met you when I was six. We're caught in a strange cycle: you chase after her, and all I can do is chase after you. Sev, if your heart was destined to belong to her, then I'll become the shadow at your side, hiding in a corner you can't see and tasting loneliness alone. Sev, as long as you're alive, that's enough. Truly... Sev, you said Lily was your sunshine. But, my darling, you are my air. Without you, I couldn't live for even a second. Don't let the blurb mislead you. This absolutely has a happy ending P.S. This story isn't behind a paywall, so feel free to read it!!!!!