From the album Middle of Nowhere
This is a self-help breakup anthem where the speaker is trying so hard to convince herself she's fine alone that the song becomes a manual for building emotional walls. The detail about turning off your phone and the preemptive 'don't tell me you miss me' reveal someone still mentally rehearsing what the other person might say. She calls it finding peace but describes it like witness protection.
Past the Dairy Queen, the county line, where there ain't any fences
Dairy Queen and county lines are the most specific kind of American nowhere, but 'no fences' tips it into fantasy. She's not describing a real place. She's describing psychological distance dressed up as geography.
And if you tried to call, I wouldn't call you back even if I could
The 'even if I could' hypothetical means she's already imagined the scenario where he tries to reach her. This is a revenge fantasy about withholding. She's not ignoring him. She's performing ignoring him for an audience of one.
There's no reckless men who don't know what they want / I'm trying to lean in to the in between
Reckless men is singular disguised as plural. One guy who didn't know what he wanted, now generalized into a whole category to avoid. 'Trying to lean in' admits the work involved. She's white-knuckling solitude like sobriety.
It's just me and me, and that's all I need
Saying it's 'just me and me' splits the self in two. One version of her is keeping the other version company. That's not self-sufficiency. That's still requiring an other, even if you have to invent one out of your own loneliness.
The song ends claiming 'that's all I need' but never stops addressing the absent you. Musgraves is great at making loneliness sound like a life choice instead of a wound. This one might be both.