<human>: Hi everyone.

The title says it all. While on my vacation, I cheated on my girlfriend with a friend whom I've known for years. We lived together and I feel like I fell out of love with my girlfriend (we'll call her F) in the last month or so of our relationship.

When I broke up with F, I told her that there wasn't another girl and that I broke up with her because I had fallen out of love, which is true. She found out that I started a relationship with the girl I had cheated on her with through Facebook though (I blocked her but she must have gone through a different account. I started dating D almost a week later. I didn't realize the stuff was public that me and my now gf, D, had been posting). I told her that I didn't cheat on her. I don't know how she found out. Maybe she's bluffing?

Anyway, I haven't spoken to her since, even though she's been texting me repeatedly asking for an explanation. She's calling me all sorts of names and saying things about D. I don't really know what to do.
Please help. I really don't want to face her.

Summarize the given text in a few sentences.
<bot>: my ex is demanding that I go into detail about why I broke up with her, because she knows that I cheated and left her for my now-girlfriend. Should I meet her, or change my number and let sleeping dogs lie?