Identity is a very hard to pin down thing.
I hate it when the Dutch reach euphoristically nationalist levels, when we have qualified for the European / World Championship football (soccer for the Americans). Everything is painted in the color orange, and insanity is prevailing for the duration of the tournament. The same thing is happening with the Olympics albeit less extreme.
I don't go along with that, and in that sense, I am not typically Dutch. If I were to live in another country this is one of the many things I won't miss, due to an already existing dislike for practices like that. Of other practices I may become aware - but only be removing myself from the Dutch experience.
If I were to subsequently return one day, I would be an off beat. Just as I am now. So no real difference there.
As for the going out only with other people of the same nationality, I could not imagine being that way myself. Most of the girls I fell in love with, were foreign girls anyway,
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I don't think you should worry so much about what your parents are going to think of you. You have not made a complete metamorphosis. Without doubt there are many Romanian things about you, which are easily identifiable for Romanians.