[action]
[Kid has lived in Nevada for most of his life, so Japanese is certainly not his first language although he knows enough to hold a small conversation. Because of that, it takes him a few moments to notice the change in suffix and when he does his smile grows a little. It makes him happy to know she's becoming that much more comfortable with him. Because he's pretty sure they are boyfriend and girlfriend now.]
You still have a long way to go, but with more practice you should be able to do that too.