The speaker is dealing with the aftermath of a relationship that changed them, and running is how they cope. The opening is literal: they sprint down the road until they feel close to breaking. But the word "Literally" also hints that running stands in for something bigger, an urge to escape feelings that keep catching up with them.
What makes the poem interesting is its mixed emotions. The speaker wishes they had never met "you," yet admits they don't want their old self back. They feel stronger now, but still miss the girl they used to be. That contradiction feels honest, since growth and loss often arrive together.
The turning point comes when the speaker compares a new partner to the ex and nearly ends things over the similarities. Realizing "he's not you" lets them step back. The final line, "You don't control my life anymore," sounds firm and a little defiant. The mood is raw and restless, but it ends on determined, hard-won independence.