alcohol issues she's had too but if you search her name here, then there are a lotttt of posts made of her by people who have both had alcoholism and substance issues. people claim that half the time in multiple seasons she acted like she was high on something (hyper active, making weird faces, having strange muscle spasms, mood disorders, weird behaviour, frozen looks etc. something what usually people on "something" aka pill or drugs have. i recommend you to check them out. a lot of people, who have been either drug addicts or subscription drug addicts , have analysed her actions from season 1. check them out :) her and kyle's relationship has been discussed a lot too (who is the one to blame etc)