Steve was an asshole and he didn’t argue anything different. While he didn’t usually go out of his way to be assholish, he didn’t say anything nice enough to make up for all the wrongdoings.
Still being friends with Tommy and Carol after high school will make you like that.
So why did you fuck around with him? You had no clue. The whole situation was marked with a caution: do not enter sign and glaring red flags, but you didn’t listen. You could hold your own, knowing when to stop. You didn’t want to stop though.
Not until right now that was. Steve was a known asshole, an even bigger asshole for lounging on a couch with a girl, staring over her shoulder at you. He was smug, smirking in your direction. Steve was trying to make you jealous, to press your buttons and see what reaction he got.