Well you know Europen Union is not the same with Europe like a continent right? EU is political and economical.
Woah so they belong to nowhere technically? Or created like 7th and 8th continent? Tell me more about it.
I would like you to check some geographycal maps. It might help you and your friend, ckit. Because Great Britain or United Kingdom still belongs to Europe.(Not European Union. Dont mix things up.) Did you know Russia too? Its so interesting right? Malta is an island and still considered to European continenet. Why not Africa!? Jesus....
Well you can read the list here: https://en.wikipedia.org/wiki/List_of_European_countries_by_population
If you dont want to read you can check the map: https://en.wikipedia.org/wiki/File:Europe_Asia_transcontinental.png
I hope I could help you.
PS.: Im not sure if you are trolling or just really that dumb.