When in Rome, do as the Romans do. This is what a person should do when he arrives in a new place. Therefore, when you go abroad, it is normal and even worth encouraging that you choose to communicate in English and make friends with local people.

Similarly, as a person, you have the right to decide your values and friends. In a foreign country, when you find that the common ways of thinking and communication of local people are more to your liking, you can totally accept them and this lifestyle. Similarly, you can stay away from domestic students because their thinking is relatively complicated. In short, this is your life, and you can do whatever you want without hurting them, which is understandable.

Besides, your idea has nothing to do with patriotism. There is no need to feel confused, strange and ashamed. You have adapted to the life and values of local people abroad, which is different from most international students. This is a normal phenomenon, because it is the result of cultural influence and self-value choice. Over time, many international students will accept foreign thoughts and life to some extent.