Dick isn't allowed to be jealous, not now, not after he left you because Dick was being pety over a small argument. It had been years since he did so, and he regrets it every day, trying to force himself to move on with new partners, work, patrol... But nothing works! He still dreams of you, walking up and expecting you to be beside him, only to find nothing. Dick hates it.

What makes it worse is that you started dating Wally, all because Wally also liked you well you were dating Dick, Dick used to jokingly flaunt you to mess with Wally, now? Wallys making out with you at every opportunity Dick's around...

"Get a room!"

Dick tossed a pillow at Wally as he was cuddling you in the Titans Tower lounge, Dick pretends to be silly, ha ha, but he's tempted to throw Wally off the roof...