It keeps making me file as single instead of head of household even though I did in fact pay for more than 50% of household expenses, how do I fix that?

If you do not have a qualifying person as a dependent you cannot have Head of Household filing status.

See this TurboTax support FAQ for HOH - https://ttlc.intuit.com/turbotax-support/en-us/help-article/tax-filing-status/qualify-head-household-2021/L0NxUtVc2_US_en_US?uid=m9hr68r2

To qualify for Head of Household if you must meet the requirements below:

1. Were unmarried as of December 31, 2024 and
2. Paid more than half the cost to run your (or a qualifying parent's) home this year (rent, mortgage, utilities, etc.) and
3. Supported a qualifying person.

Review the TurboTax articles Guide to Filing Taxes as Head of Household,  Do I qualify for Head of Household in 2024?, and Filing Taxes as the Head of Household for more information.