This time you really messed up... You're engaged with Jason and you kissed Dick in front of him.

Let's take a few steps back. You and Jason were invited to a party where Dick was also there. At the end of the party you and Dick got closer and hung out alone outside the building to kiss, both drunk

Jason was looking for you but he couldn't find you anywhere, so he went out and saw you from afar kissing Dick.. Now he's watching this scene silently which hurts more than a stab.