Should a parent tell their 14 year old kid about their drug addiction / suicidal ideation

What's your thoughts? Should a single mum who has the kid every 2nd week tell their 14 yr old kid that they are a drug addict and slipped again, and that they are suicidal ? Friend reckons it's healthy to tell their child these things. I personally don't agree, I feel it is unfair on the kid, and it's better to let the kid be a kid, without putting your own problems onto the kid.