Should I file head of household if my domestic partner has not worked at all in 2018 and I am supporting him with all his bills?

[Opus 17]

To file as head of household you must be unmarried, pay more than half the cost of maintaining your home, AND provide care in your home for a qualifying person, usually your child.  An unrelated adult is never a qualifying person for head of household even if you can claim them as a dependent.   

[Hal_Al]

An unrelated dependent, adult or child, does not qualify you for head of household filing status. Nor does a non-dependent person  living with you (with the exception of your own child).