How should I tell people that I'm feeling suicidal?

I mean, I've been feeling like this for a long time. (8 months?) I've even been hoarding pills and researching the best way to kill myself. At one point I even tried to suffocate myself. The problem is that my school shrink is a friend of my mom, and my mom is really judgmental. And don't tell me to call a hotline because I heard those are crap, and I'd have to use my mom's phone, then she'd know. I just feel like I need to tell someone all this, but I'm afraid of what they will think. Should I tell my BFF? And how?