On friends

I'd rather a friend who would tell and teach me right from wrong. One that attempts to show me both sides when I'm undecided. I have doubts about those that simply state "I'll support whatever decision you make." On the surface they may seem supportive, at the same time I can't help but to feel if I had chosen wrong path, would they still support my decision and let me perish? Or perhaps they will wait and only to save me in the nick of time?