Tell if he's not interested or just introverted by what he actually does

An introvert might need hours or even a full day to respond. That's real. But when the reply comes, there's something in it that shows he was actually reading and thinking. He'll reference something specific from your message. He'll ask you a question that picks up on what you said, not just what you asked.

A guy who isn't interested replies slowly too, but his replies are hollow. They don't build on what came before. If you mention something about your day and he replies "cool", that's different from "cool, what made you decide to switch jobs?" One response shows he's thinking. The other shows he's being polite or killing time.

Watch for consistency across multiple exchanges. Real introversion looks the same every time: slower pacing, but real engagement when he does reply. Disinterest is erratic. He might reply quickly one day and disappear for a week the next. That pattern is what matters.

Your reply should be warm and direct. Ask something specific that requires him to actually think and contribute. Not "how are you" but something that connects to what he said or something you know about him.

If he's an introvert who likes you, a thoughtful question will pull a thoughtful answer out of him even if it takes time. If he's not interested, a thoughtful question will either get deflected or ignored. You're not trying to convince him. You're creating a situation where disinterest becomes visible.

The move is to invest once, then wait. One good message that shows you're worth talking to. If he doesn't meet you there, you have your answer and you stop reaching out.

Send one message that's clearly an opening for real conversation. Then wait three to four days. This is long enough to account for introversion, someone being busy, or just a slow communication style.

If he replies within that window with something real, you're probably fine. Introverts do eventually show up. If he doesn't reply at all, or replies with one word only, do not send another message. You've tested it. That's your data.

If he replies weeks later with an apology and an explanation, you decide whether that's a pattern you want to keep dealing with. But the second message comes from you only if the first one landed somewhere real. After three to four days of nothing or minimal effort, move your energy somewhere else. You're not being cold. You're respecting what he's showing you.