The context of the following conversation is Alex had to stay late and missed the school bus, so Alex walked home from school one day.:
Alex says I think I'm too tired to come over to play video games today..
The friend responds Why is that?.
Alex responds I missed the school bus and had to walk home from school..
The friend responds Isn't your house like a few miles away from the school?.
Alex responds It is. That's why I'm so tired..
The friend responds It's okay. We can just play video games online..