Condo with Two Owners: Tax Deductions and Mortgage Interest

Recently, as of 2025, I purchased a condo as my primary residence. The title and loan are in both my girlfriend's name and mine. I pay the mortgage (includes the principal, interest, and escrow), while she covers the condo and garage fees. Our tax filings are separate. We do not plan on getting married, and we do not co-own any bank accounts. My taxes are complex, including real estate in different states, foreign and domestic stocks, dividends, cryptocurrency, federal treasury bonds, and state municipal bonds. Over the last few years, I have itemized my deductions. Question: How do we claim the condo mortgage and condo fees? Should we file as I've outlined above, or is there something different we should do?