This is pretty normal. I don't feel attraction for foreign women either.
It's the culture difference. With your own culture, you already know all the facial expressions, body language, communication styles, suggestions, slang, etc. When you are speaking to someone from another country it is like talking to an alien. They don't follow any rules and just do what they want.
An example is that an American will not overly criticize you when you do something wrong, but will criticize you for it later. A German will brutally criticize you for it, but praise you later??? An English or Australian won't directly criticize you but will make a sarcastic comment and judge you for it later.
It just gets confusing and it's easier to deal with your own culture.