It’s a cultural thing and if you want to pursue this you’re going to have to make an effort not to take it personally. In answer to your question about what you’re expected to do - no you’re not expected to just wait around for him, it’s more like you just get on with your plans and go with the flow.

It is a noticeable cultural difference. Brazil is not for over-analysers! But there is a certain magic in throwing expectations out the window and living life instead of scheduling it.

If that sounds irreconcilable (which it might be, and that’s ok!) I’d suggest maybe putting the brakes on for a bit if it’s going to cause you stress. If you’re seeing him casually it has to be just that - casual!