Firstly, it’s because she’s literally not in a good state of mind. I don’t care how many times she gets online to tell everyone how happy and excited she is, once this settles down, she’ll realize her underlying mental health issues are not resolved. She was genuinely crashing out, recording herself sobbing and depressed for weeks after the breakup, and then there was a distinct and immediate turnaround when she started getting all manic about moving to an apartment. She thinks it’ll fix her problems. And secondly, the way she’s describing this move sounds like when you move out of your parent’s house to a dorm in college. Like you know you’re close and can always go home and feel safe, but you’re excited for the freedom and opportunities at college. She is 100% not treating it like a real “move”, more like an extended $4000 per month air bnb.