<human>: I haven't texted her or messaged her at all since we broke up because I want to "purge" her out of my system. The breakup was fairly mutual, I really like her and still think about her, but want to avoid social media and texting just to get her off my mind.

Every so often, I'll get texts from her at ungodly hours in the morning (like 3am-4am). They are articulate and laid back but she clearly only contacts me when she's drunk. I always respond the next day but she seems really short with me sober.

Why the hell would she be doing this?

Summarize the given text in a few sentences.
<bot>: Ex only texts me when she's drunk then gets short with me sober. I haven't texted her since the breakup. Why is she doing that?