Wanting to live alone first doesn’t automatically mean he’s unsure about you. For a lot of people, especially if they’ve never done it, living alone feels like a milestone. Independence. Learning how they are on their own. That can actually make moving in together healthier later.
What matters is the tone behind it. Is he saying this calmly, like a timing thing, or defensively, like he’s buying himself space? There’s a difference.
You don’t need to panic, but you do get to ask questions. Like what living alone gives him that he thinks he needs first, and what moving in together looks like to him down the line.
If his answer still includes you, just not yet, that’s not a red flag. It’s just a slower pace.