AIO? Girlfriend let me down on Christmas...

*Disclaimer: I am posting this for my friend. These are his texts and his situation.

My (27M) girlfriend (28F) and I have been dating for about half a year. On Christmas Eve, I gave her a few gifts that I had put a lot of time and thought into buying for her...and she told me that she'd forgotten to get me anything. Obviously, that stung, but she's been busy and having a hard time lately, so I tried to let it go. But then she was supposed to spend time with me and my family on Christmas for dinner. She didn't show up.

She's been saying she's anxious and depressed and needs space lately, which is fine, but whenever I try to talk to her about it, she accuses me of not trusting her or feeling secure in our relationship and basically frames it as a me problem. She's always calling me disrespectful and inconsiderate and says that I don't care about our relationship. Yet she completely forgot about and bailed on me for Christmas. I'm feeling so drained and defeated. I don't even know how I'm supposed to respond to her most recent text. She told me not to come see her, now she's saying she wished I would've come to see her.

For added context, after seeing her talking to other guys on a dating app a few months ago (she claimed it was for friendship as it was on Bumble, but they weren't labelled as "friend" matches, meaning she matched with them on the dating part of the app, which she denied), I tried breaking up with her, but she called that "giving up", "immature", said that I have no respect for her feelings, etc. I caved and rescinded the breakup. But now after all of this, I'm thinking about breaking up again. AIO?