8. “I’m sure you’ll be fine on your own.”
This might sound like you are encouraging your Japanese girlfriend and being supportive, but essentially, this is what guys say when they want to pursue other women. If your Japanese girlfriend is good at reading people, she might notice what you are actually trying to say, which is: “I think you’ll manage on your own, but I need to be there for someone else.” Be careful because she might resent you for neglecting her.