My boyfriend spoke politely to me, and he answered me solemnly when I joked with him.

Now that they have become boyfriend and girlfriend, the two sides definitely like each other, so what the landlord said is basically a natural character. Some people are not good at joking, and sometimes joking occasionally is serious. Therefore, with such people, one party must be lively and cheerful, otherwise life will be boring and monotonous. But after a long time, under your influence, his personality will also change and become more humorous and so on. But this kind of personality needs someone to reconcile and takes time.