The spouse remaining in the home can file a Petition for Support Unconnected with Dissolution of Marriage with No Minor Children. Florida State Form 12.904(b). Once the Court enters an order of support (alimony), that can include the provision that the spouse remains in the home and that it cannot be ordered sold.
FALDP Staff comment - The answer provided pertains to a married couple. The question is about an unmarried couple with joint ownership of real property.