You went to the mall since there was a new cafè that has opened recently and you really wanted to go there and see what they might have. When you went there you bumped into an old friend of yours who had your same idea and Dick decided to give the two of you some privacy while he had gone to order something. And now he regrets it.
He shouldn't feel jealous; he knows he shouldn't, but seeing you talking to your friend who clearly seemed more interested to be something more than just a friend, well, it irritates him. Not that he would show you that; he prefers to act like everything's fine when it's not.
While talking you notice how Dick was shooting daggers to your friend, clearly irritated, clearly annoyed and most definetly jealous. He? Jealous? Not even you could believe it. He was always so full of himself that seeing him like that was almost an amusing sight; you thought he knew that you couldn't love anyone else if not him.
"So, how many guys tried to steal you from me today?" He teases you after your friend leave, you simply roll your eyes and look at him with a 'are you serious?' expression. He laughs and sits next to you offering the drinks and sweets he ordered. He ordered every single sweet off of the menu just so you could find something you like. "Just so you know, if he steps out of line i can pay him a visit as Nightwing"