My world is crashing down

Work and school has stressed me out. my mom is always a jerk to me and she makes me feel like i cant do anything right. i just found out that my friend has cancer and i cant do anything to help her. And everyday i have to fight the thought of killing myself which is hard enough. my world is crashing down Every night i cry myself to sleep wishing all my pain will go away.im tired of fighting the world i live in everyday, its become to much for me to handle. everyday i just have this thought i could end all my pain.I have to put on a brave happy face everyday so no one will is realize my world is crashing down.