I have a different take, as a woman who has not once in my life called a man at “u up?” hours, woken him from a dead slumber with an offer to come over, and then kept him up until 5 am playing video games and chatting:

In any culture that does not have strict religious guidelines, the interpretation would be that you booty called him. He woke up and came over because it seemed like you were offering a booty call. He was nice about it, but he told you he had things to do in the morning, and what you asked of him was an actual disruption to his day. He may like you, but what you did was inconsiderate.

If he is a good guy worthy of good relationships, what you did last night may well be unworthy of him. People are not play things to be called up and used to alleviate insomnia, especially when they make it known they have responsibilities the next day (something I’m sure would not have come up unless he was hinting at wanting to sleep) and you are content to have them stay up all night entertaining you instead.

In my mind, this goes one of two ways. Either he is happy to have the attention and still wants to pursue something with you, or you’ve just given him an ick. Whichever it is, that’s really for him to find out and relay to you, but I would apologize for keeping him up regardless, because I would’ve been annoyed in his place.