What Am I?

Croatian. Makes sense now that you've said it.

Round 2. This guy might be more vague than the Croat.

youtube.com/watch?v=cUbCp2WgkYw

Thats what Croats look like. I think these ones are filthy commies though, anti fascists.

Romanian?

Nope.

Serbian? I'm not too good at this.

Lithuania. You might want to change up your pictures, as they're easy to google.

Romanians look more like this.

Actually, hes supposed to be a Czech. Source?

His Facebook is here:
FB do com/Tomas-Dragunas-1291435940926179

And I assume this is his linkedin, which says he's going to Vilnius University.

lt.linkedin.com/in/tomas-dragunas-a832ba13b