Haha, you ask, is it economic diplomacy or emotional diplomacy in the international arena?
You guys have such a good relationship, whether you want to pay rent or not depends on what the landlord thinks. If the landlord feels that your relationship is so good that he is embarrassed to charge you rent, or if you try to say that you want to move out one day, but the landlord is reluctant to leave you, and would rather not charge you rent and provide you with food and accommodation in vain than to separate from you, you can It worked.
But between friends, I think it may be more appropriate to separate financially. If you make friends, you just want to take advantage of the other person. This friend won't last long either.