Do you think this is a start of addiction?

so i been trying to get as many asnwers as possible on this question. i posted yesterday about this 16 year old girl who drinks, does pills, smokes weed, in the past done bath salts, crack, coke, e pills, computer duster, and a few other things, this started when she was in 8th grade. she been through alot in her life, more then you could probably imagine so i feel as though she hides her pain with these things. her moms an alcoholic and tried killing her when she was 8 years old, she forgave her mother but being she loves the booze to much she isnt in her daughters life, she reaches out all the time for her mothers love but always gets let down, her father step up and been taking care of her but his health is getting worse everyday and she has said it hurts to watch her bestfriend slowly go right in front of her eyes,she is pretty, popular, funny, outgoing but has this problem of not wanting to stop partying. she is known for being a party girl, always the life of it! not to many people know about what she does, besides drinking and weed, and some pills, she keeps most of it a secret but were really close so she tells me alot! shes always drinking, she used to get good grades and play sports but now shes in 10th grade, completely failed this year, fights, gets in trouble, and just doesnt care! she breaksdown all the time in tears expressing how she never thought her life would be like this at 16 but it is and shes confused. now, she swears on everything she can stop but doesnt want to right now because shes just living her life as a teen and having fun, many of her loved ones dont see it like this. im truly concerned about her and dont know how to help. do you think this is a problem or simple growing up and learning from dumb choices???? all she ever wants to do is get messed up, like all the time. i mean she can go a few days without it, not by choice but because of no money or w.e but she told me she hates it and as soon as she has the chancee to get something to mess her up, shes on it, its so sad! i love her and im just worried this is a developing problem?? what do you think about this situation?