It will cause you friend to be self-obsessed and paranoid, thus a very unpleasant person that no-one wants to be around.
You're not old enough to help. Convince them to get help before they completely ruin their life.
I'm sorry, babe. You just do what's best for them.
omg my Mom was on that **** for years it will destroy them if they stay on it..please get them help so they can stop using it!!
if he dont want help then there nothing you can do but be careful ppl like that get std's n stuff plus they gonna start looking old n they bodys gonna start dying.
I would give it a go. Can't hurt to give it a try.
But not until you are older did not realize you are 13-15.