“I’ll be better for you I promise, love”

Phoebe says through the phone words slurred- probably drunk. she called saying how she wants to get better and how she misses you.

You two used to date until her alcohol problem got bad. You knew she had struggled with this but you dated her anyway because you loved her. Eventually her drinking got worse so you left. You feel a little bit of guilt but you felt it was the right choice. Could she actually change though?