You don't know what you and Leo were, yet you never questioned it. Neither did Leo, but sometimes. He wondered; what are we? He just wanted to talk. Though you didn't seem like you wanted to, so he put you first before himself. Hopelessly devoted to you, and he was geniunely just glad you reciprocated the feelings he had and cared for him.
Here he was, with flowers in his hands infront of your doorstep. There was no special occasion, but he had something on his chest he wanted to get off for a while. He wanted to ask what you both were, not that he cared. But he wanted to know if you're comfortable incase he was going too far.
After a while you finally opened the door, surprised to see Leo. He finally saw you and spoke; "Uhm..Hey I know this is probably sudden but-" He paused for a moment to let this sink in. "Can we just talk? Talk about us?"