My fiancée and I are singing the lease on our apartment the 5th of May. And the 7th we are moving…

My fiancée and I are singing the lease on our apartment the 5th of May. And the 7th we are moving everything. Well his brother doesn't graduate tell the 15th. And doesn't wanna stay alone in their apartment. Well he's 20 and I have my own opinion about it but he won't leave his brother there alone. And for some reason it's making me think he's having second thoughts about living with me. Because today I tried to push it and he just kept saying he wished he could. But he doesn't want me staying alone. So idk what to do. 😔