Hello, I am taking Japanese in college for my language credits, but I have also studied by myself off and on for a while. Today in class I used koibito for a conversation practice lesson where you preform a rehearsed conversation with another student in front of the rest of the class. The conversation usually follows a vague script, but small contexts will change, like instead of talking about your relative it will switch to be about your partner or friend. I used koibito because the switch was to talking about marriage, and I didn't think much of it, but my professor who is Japanese seemed pretty surprised, and then she also brought it up to me and complimented how I did after class as well. So now I am just curious if it is a surprising or uncommon word to use or anything like that? I am in a Japanese 103 class if that helps. Thanks!
edit for spelling mistakes
by bruh__why5