Harry-
When he gets jealous it normally turns into a wand duel. You'll pull him away and calm him down.
Draco-
Draco ignores you. "Draco please." You would go on begging for a few hours. After a while you just kissed him and walked away. Every. Single. Time.
Young!Sirius-
You two just talked about it. You would comfort each other by cuddling and talking.
Young!Remus-
He will get you away from the guy then leave and cry, avoiding you at all costs. That is, until you apologize to him.
Tom Riddle-
It's Tom we're talking about. Who would dare flirt with you?
