Sirius took a running leap at the stone step to buy himself some time. He had been aiming for a graceful vault over the edge, but landed awkwardly and ended up scrambling up like an injured cow.
"It's really nothing Prongs," he wheezed, trying to get his breath back. "Just something I've been thinking about." He reached out and mussed James' hair. "But don't worry, you just confirmed my suspicions. It's the bachelor life for me!"
Sirius didn't want to think about it too much anyway. He knew it wasnt fair, especially since he'd brought it up, but listening to James talk about Lily always made him feel out of sorts. Not that he'd ever tell his friend that. He was happy for him, obviously! He loved that James was in love. Was happy. But try as he might Lily had never fit into his "Marauders against the world" narrative. It wasn't James' fault. He couldn't control who he loved. It was just a constant reminder that their friends hadn't been enough for James. That Sirius hadn't been enough.
And why would I be? Stick with what you know Black. Love isn't for people like us.
"Come on, we're almost at the backwards hallway! Then it's just a hop and a jump to the Tower. Hope the door is still there!"