BEGIN SPOILERS: The movie presents the premise through a journey. It starts with the protagonist yearning to be free and go out of the hospital, back to her past life. She makes the clear purpose to burn bridges and get to her final destination to die. Her friend represents her family and people close to her that don't want to let her die.
What about the dude? Well, he's a clean slate of contemplation. He's the outsider looking in. He tries to help both of the girls coping with death and letting go, enjoying just the present. END SPOILERS:
I believe that the movie is quite slow-paced and can make most people anxious or feeling that nothing is going on. And I agree. It does feel quite stretched. Camila Sodi's performance seems quite limited; and her "norteña" accent can be distracting. Luis Gerardo performs ok, but the role wasn't all that difficult for someone with his experience. That leaves us with Tessa's performance, which is the best among the three.