I don't know what to do and have no one to talk to?

I've gotten as far as contemplating suicide,
I keep disappointing everyone around me and can't finish anything I begin.
I miss school once a week and haven't been in class for a week straight,
and now as I'm trying to find a reason as to why I did it -
I can't.
I don't know why I missed school.
But I'm failing because of it,
my parents don't know either, they think I have a 90+ average.
I can no longer meet their standards,
I recently lost most of my friends simply because I cared for them.
I lost two friends in the summer due to a drunken car accident and my group of friends swore they'd never do drugs again and now they're back at it and it angers me.
For this reason they lashed out and now I'm not a part of their lives.
I've never done drugs, I'm a good person but I'm just a failure.
I'm capable of so much but I just don't do anything.
My education is in the dumpster, very little care about me,
I just want to be put out of my misery.
I really just want to end it all now.

I used to love to dance and I stopped for reasons I dont understand either.
Ive given up on everything