Just because there was nothing to be jealous of didn't mean Steve wasn't jealous. Mostly it was just a little possessive, but he kept it to himself or until later when they were alone. He knew it was irrational, but jealousy wasn't reasonable like that. It simply was. Really it was far easier to handle in this small town than it would have been back in the real world where Tony's Celebrity was so well known.
Sometimes it still felt impossible that he was allowed to have this, to be close with Tony like this. He'd wanted him for so long and before that the idea of actually being with a man had just seemed like a path to misery and self loathing. So to end up here and have all he did, it was still at times overwhelming.
There was plenty of blushing that still occurred and still would probably indefinitely. Tony had a filthy mouth when he wanted to and Steve knew he enjoyed getting his cheeks to colour when he was in a certain mood. "I guess I do like you," Steve agreed softly.