<human>: My girlfriend and I (going out for half a year now) have been eating out more frequently these days, and she usually insists on paying for my meal. Even though I really appreciate the gesture, for the past few weeks I've been telling her that we should just split the bill or that she doesn't have to pay for me. 

A few nights ago, she paid for me again, even though I told her not to. Out of exasperation, I let out an "ah, fuck." She hears this, flips out, and says "What did you just say? I'm doing you a favor here, and this is all I get?" When we try to find a table, she tells me to go sit somewhere else and moves as far away from me as possible. I'm tired of being ignored at this point, so I give up trying to talk to her and eat in silence. When we're done, she turns to me and says, "Oh so you don't even want to look at me now?" 

Even though we reconciled later on, I'm still a bit hung up about what went down. I know the whole argument happened because I dropped an f-bomb while she was trying to do something nice for me, but I can't help but think that she overreacted. Was I in the wrong here?

Give me the gist of the text in a nutshell
<bot>: Girlfriend keeps trying to pay for my meal, even though I didn't want her to. Dropped an f-bomb out of annoyance the other night, and she flips out. Was I in the wrong?