All perfect praise be to Allah, The Lord of the Worlds. I testify that there is none worthy of worship except Allah, and that Muhammad is His slave and Messenger.
Children should obey their parents. This obedience includes all aspects of life. Since marriage is a decisive turning point in the person's life, you should seek your parents' advice as in choosing the woman who will be your wife, who will be the mother of your children, and hence, will have a special relation with your father and mother. This does not mean that the man needs a guardian like the woman, neither does it mean that one of the two witnesses should be the man's father. This is, as we mentioned earlier, part of obedience, good deeds and pleasing of one's parents.
So, we believe that you should talk to your father about your marriage explaining to him the reasons of your marriage to that girl even if this requires his coming to Romania to visit you and her. But the most important thing is that you should be prepared to listen to him and accept his opinion and act according to it. Know that the father is very keen on achieving the well being to his children and he has more experience than you. But if you happen to marry this girl, do your best to strengthen your matrimonial relation with her and to teach her Islam. Behave with her in an Islamic way, so that her heart becomes more lenient to Islam, her new religion.
Allah knows best.