As with every episode of this anthology, this one leaves you with no clear ending. So here's my take...
Lauren is obviously unhappy with her life, mostly due to a lack of love from her mother (and apparently non-existent father). She is befriended by a spoiled girl who apparently loves her (not sure why) but is also manipulative and controlling like her mother. Lauren realizes that her friend doesn't appreciate her mother's love and feels like she doesn't deserve it, and is also jealous.
So the 3 storylines presented about what happened after her bedroom show that she equates Elena with her mother and finally stands up for herself, that she goes to the woods and accidentally kills Elena, and then that Elena disappears in some sort of distress. Although the 2nd line was what Abby believed happened, I also believe Lauren killed Elena after she kissed her, feeling overwhelmed with fear (at Elena hiding and pretending to be the lumberjack), then anger at her supposed friend being that cruel towards her, combined with the weed I think Lauren snapped and murdered Elena as a sort of proxy for the hatred Lauren has for her mother.
The dream sequence in the cabin brought Lauren's psyche to a crossroads, where she could either come clean about the fact that she murdered Elena, or continue to live Elena's life. She chose the latter, feeling that she deserved it more.
Lauren is obviously unhappy with her life, mostly due to a lack of love from her mother (and apparently non-existent father). She is befriended by a spoiled girl who apparently loves her (not sure why) but is also manipulative and controlling like her mother. Lauren realizes that her friend doesn't appreciate her mother's love and feels like she doesn't deserve it, and is also jealous.
So the 3 storylines presented about what happened after her bedroom show that she equates Elena with her mother and finally stands up for herself, that she goes to the woods and accidentally kills Elena, and then that Elena disappears in some sort of distress. Although the 2nd line was what Abby believed happened, I also believe Lauren killed Elena after she kissed her, feeling overwhelmed with fear (at Elena hiding and pretending to be the lumberjack), then anger at her supposed friend being that cruel towards her, combined with the weed I think Lauren snapped and murdered Elena as a sort of proxy for the hatred Lauren has for her mother.
The dream sequence in the cabin brought Lauren's psyche to a crossroads, where she could either come clean about the fact that she murdered Elena, or continue to live Elena's life. She chose the latter, feeling that she deserved it more.