Help!

I'm only 14 but it feels like my life is falling apart. First of all my half brother has come into my life ( I have never met him ) then my supposed best friend won't talk to me because I spoke my mind how she is constantly putting me down yet she is like a sister to me. I was bullied last year and am still bullied this year. How can I do anything when I have so much on my mind and what makes it worse is that I have trouble getting to sleep. My mum doesn't understand and my dad is a truck driver so I barely see him. What makes it worse is that the friends I have right now wont understand and imnot allowed to talk about my half brother to them which I need to talk about it to someone who isn't family I guess. I really need advice!!