How do I ask my friend for rent? What should I do if I agree to rent for a month but then I don’t submit the rent?

Tell me directly, because it was agreed upon by a friend. It is impossible not to collect it when it is due and to continue to delay it. If there is a reason, that is one thing. The problem is that it is not said in advance that you will find it yourself. Just mention it when you get the chance, it's okay, think about it differently, if you need money, will you not charge them? It doesn't matter if you are thick-skinned, friends should be considerate and proactive