Man won't let GF break lease to care for sick grandma; says, 'I don't want a roommate.'

'AITA for not letting my gf be removed from the lease?'

My gf and I lived together for 5 months and it’s been going good. But her grandma recently had a fall and requires care and someone to live with her because she was on the ground for hours before gf’s mom found her.

Our apartment is one of the cheapest and yet I can’t afford it alone, my gf wants me to remove her from the lease while she lives with her grandma. But I don’t want to live with a roommate anymore and told her she should keep paying for the apartment that we sign a year for since living with her grandma is free.

But she’s angry that I won’t remove her from the lease and find a roommate calling me childish for not just finding someone else to live with in the meantime and letting her live with her grandma which is a hour away.