WHAT HAPPENED in that timeframe?
Even more so today!
I've been thinking and I might have some ideas about this.
For
Ruth, I think that Billie became increasingly toxic for her recovery. Ruth wants to be sober, she wants to address her depression and she wants to grow up to be a responsible adult, despite all of the problems she had in her youth. However, I fear that the problem is that Billie was constantly this niggling presence urging her for one last party, one last alcoholic bender and to stop taking the medication or attending therapy. I've got a feeling that Ruth gave Billie an ultimatum about her attitude towards self-improvement and Billie walked out on the relationship.
For
Billie, her objective has always been clear: She wants to be the Alpha cool kid, living an edgy, exciting life. However, Ruth just was changing too radically for that to happen. There was no more sexy lesbian suicide pact. There was no more dangerous near-violent interactions. There was no more drinking to unconsciousness. Instead, there was sobriety, responsibility and (and this must have been the ultimate insult to Billie), therapy. I think that, by the time that Ruth issued her 'shape up or else' ultimatum, Billie was looking for an exit door and took it when it was offered.
I think that Ruth is still trying to persuade herself that giving up on Billie after she walked away was a good thing for her own long-term health. Regrettably for Billie, I think that the dangerous and criminal-associated (Billie
must know that because of her association with the Walkertons) ultra-cool bad boy Asher is more in line with what Billie wants to enable her preferred social position and life-style.