[PantsOnFire]

You need to deploy a wide array of tactics with people like this. The essential gist is that they are left behind when they are late.

For example, if you are going out for an evening, don't accept a situation where you wait for him to show up. Instead, say you are leaving at x o'clock and then leave if he is there or not.

And by all means, avoid needing to depend on him to be somewhere. Actually, avoid having to depend on him for anything. Schedule your life out and stick to it. He can join in when he gets there, leave it up to him.

You'd have to be more specific but sometimes people do this as a form of control or a form of making themselves more important.

Give some examples of why you need to wait for him and we can go from there.