<human>: My ex-SO and I broke up because she wanted time to 'be alone'. We planned on being friends, but that quickly dissolved when she began constantly talking about, texting at all hours, and hanging out with the trainer from her gym daily. He's been into her for months.

Anyway, she moved out of our condo last week (took the cat..), and I'm only here until the lease is up in December. I'm likely moving all my stuff out Dec 1st. I planned on going NC with her indefinitely, but there are a few things:

When she moved out, she took the mail-key. She plans on being back later in December to tidy the place up before we hand back the keys (separately, I hope), and she offered to pay me for some of my possessions that she wanted to take.

It's been a week, and I'm wondering if I'm just looking for excuses to break the NC. Should I e-mail her about the stuff and ask her to come by while I'm out to leave the stuff?

Can you summarize the given text in a few sentences?
<bot>: Girlfriend and I broke up. She moved out. Have been NC, but she took the mail key and didn't leave the money for some items she took.