I'm going to tell an adult about my friend's problems
Do you tell everyone about everything going on all the time?
Yes, I like to talk about my problems with everyone
If your friend has a problem that only an adult can help resolve, it's a good idea to confide in an adult and get your friend the intervention he or she needs. Though it is usually important to maintain a person's privacy there are exceptions that should be made when the issue is significant enough.
I already did that, except I'm not looking for help.
I am really proud you told someone. It can be hard if you feel like you are breaking your friends trust. You did the right thig, never feel guilty about it.