The deleted post:

My (27M) girlfriend (25F) moved into my condo about four months ago, and things have been rocky ever since. For context, I bought this condo five years ago, well before we started dating, and I pay the mortgage, HOA fees, property taxes, and all the maintenance costs myself.

When she moved in, we agreed she'd pay me "rent" since she'd obviously be living here and using everything. I set the amount at $1,200, which is about half of what a one-bedroom in our area costs and significantly less than what she was paying before (she was in a studio paying $1,800). I thought this was incredibly fair since she's getting a larger place and doesn't have to worry about maintenance, property tax, or anything.

However, she got upset, saying that since this is my place and I built equity, she shouldn't have to "pay my mortgage for me." I countered that she's not paying my mortgage - she's paying rent to live here, just like she would anywhere else. She argued that if we were renting an apartment together, we'd be splitting the rent 50/50, but since it's my condo, she's "just helping me out financially while getting no benefit." I said her benefit is having a nicer place for cheaper than she was paying before.

She suggested instead that she just split utilities, groceries, and household expenses, but I told her that's not fair to me because I still have to cover all the mortgage, HOA, and property taxes on my own. If we were renting a place together, she wouldn't just be paying for utilities.

Now she's been passive-aggressive about it - making comments like, "Must be nice having someone else pay your mortgage" and "I guess I'm just a tenant, not your partner." She even stopped inviting friends over because she says she feels like a guest in her own home.

I feel like I'm being reasonable, but she's making me feel like a greedy landlord. AITAH?