He's slightly nervous around you, even now

A man who is truly into you doesn't fully relax. Not in the uncomfortable, anxious way of someone who doesn't trust themselves — but in the alert, sharpened way of someone who cares about the impression they're making. There's a low-grade watchfulness: a desire to be a little better, a little funnier, a little more present than usual. It's the opposite of being taken for granted. The slight nerve is the proof. When a man fully relaxes into comfortable indifference — when the date starts feeling like watching television — the attraction has leveled off. The man who is falling for you is still trying, even when he doesn't need to. He'll catch himself and straighten up when you walk in. He'll choose his words a little more carefully. He won't say he's nervous. But you'll be able to see it, and it is one of the most flattering things a person can show you without ever saying a word.