The look on his face... So much pain. I find this to be absolutely brilliant! I can see it now... Your character and another talking in the rain.
YC: I don't want to leave, please. [the other person caresses his face]
OC: Shh, we both know you belong with Oswin, if you don't go we both know you'll regret it. Maybe not today, maybe not tomorrow but soon and for the rest of your life [kisses him passionately] we will always have this moment.
[Bus pulls up]
OC: Here's looking at you kid.
YC: You're such a dork [crying while trying to laugh]
OC: I love you, I always will now go it will be fine.
YC [slowly get's on the bus] I love you Charles. [minutes later the bus leaves]