Is it normal to make coffee date with someone at house then sleep in late?
So I am on a study abroad in France and I met this guy from Sweden. He is cute but he is living with a friend of his here who is a girl. I found out they weren't seeing each other and since I have a crush on him I asked him out to coffee through text. He was slow to text and our schedules weren't lining up but at the last party I saw him at he asked me if I would like to do coffee at his house two days later, so I said yes.
Quick side note this wasn't the first time I had been to his house. Second I read about Swedish culture and it is common to have a fika "coffee time" with friends or potential dates. So just because I got invited to his house for coffee doesn't mean he is interested he could just be really friendly...
Anyways I showed up at his place and he was still asleep. His roommate let me in and we talked for a bit. considering it was the weekend and I myself was late I didn't see too much problem with his sleeping, but I was thinking that he probably wasn't too interested in me. After a bit his roomate went to wake him up and out walked a girl with him. I went super red and felt awkward since I had no idea he had a girlfriend.
So my question. Is it normal to invite somone over (opposite sex/someone showing romantic interest) forget they are coming and sleep in with your girlfriend? My friends think he is an ass. I don't know of I just missed something. Still interetsed in being his friend. Could it just be a cultural thing?