I am Mexican, and I have a relationship with a Japanese guy. One time I went out with a guy friend, I know this guy friend doesn't have interest in me and I don't have interest on him. We went out because he was leaving to USA and I consider him a very good friend. I told my boyfriend I was going out and told my plans. I used the word "friend", so maybe I should have used "male friend". When I got back home he asked me if I went out with a guy, and I said yes, a friend of mine that was leaving and we wanted to catch up. He explained me that in Japan that is affair, so I felt really bad because I was ignorant about that and I was really sorry for making him feel bad, I explained it wasn't like that at all and he told me he was trying to understand. I personally don't see anything bad about this, I didn't lie to him, 4 months have passed and he still brings that up, because I choose to go with my friend instead of him. I really understand his position, but he CAN'T understand mine, I really was ignorant about that thinking, what can I do to save my relationship? What are your thoughts?