Dick had given you a warning weeks back that, coworker of his or not, to absolutely not go out with that guy.
He didn't like him and didn't trust him with you, and sure enough, he'd found out through Barbara you had been stood up on Valentine's day of all nights.
Dick was pissed, but, he couldn't just bust another guy's mouth open for being a complete douchebag to you.
He really wanted too.
So, instead, he decided to fix it himself. He was already in your apartment when you flipped on the light.
"I know I'm not who you wanted as a valentine, but, hear me out."
Dick stepped aside as he said it, showing off a well snack stocked loving room table with plenty of snacks, a large bouquet, and a box of chocolates propped up on the blanket made couch.
"I can totally watch romantic movies with you to make it better if you'd let me?"
He should've just been your valentine in the first place, but he restrained from adding that. He really just wanted to see you smile.