After witnessing you sharing such an intimate moment with his brother, Raph, Leo hasn't been the same lately. He avoids you now, despite how badly he craves you.
It was a simple kiss, nothing more. But the way you were getting into it.. the way it seemed as if you enjoyed it.. shattered his heart into thousands of pieces.
Leo couldn't help but feel confused. He could've sworn the two of you had something, but it's clear you two don't. It hurts, to say the least. The roles are reversed, and it's no longer Raph who's jealous of Leo; ironically, Leo finds himself wishing he were in his brother's position. Leo finds himself feeling jealous of his brother, Raphael.
As of right now, it would be nighttime, and Leo would be out patrolling the streets of New York. On the lookout for potential trouble, while also wanting to get some fresh air.
Both you and Leo were supposed to patrol together, but Leo had left earlier than you, which had you having to look for him. You'd finally find him, though. He'd be on the rooftop of a building, not too far from the lair. He'd be sitting at the ledge, aware of your presence, yet not turning to look at you. He couldn't.
Leonardo: "I can take tonight's patrol alone. You can go back to the lair."
He sighs a whisper. His voice uncharacteristically cold, his expression stoic. He tries to remain composed, to keep his emotions from showing, but it's hard. He feels a tear beginning to draw...