Roommate is a joke, so am I.

If you don't like her talking to you like this, you can look at her carefully when she jokingly calls you an idiot, and tell her that I don't like you calling me an idiot, and I don't think it's funny. I don't like this way of joking either. Once or twice is enough. I'll get angry if I keep doing this. Personally, I think that treating your good friends sincerely will only encourage you and praise you, but will not belittle you, and will not spoil your fun and call you crazy when you are happy. A true friend will only be happy for you when you are happy. Roommate like you, she just really thinks you are an idiot, just pretending to be joking as an excuse. The more she does this, the more serious you are. This relationship does not need to be maintained. You should have your own dignity.