I need help, im 14 and really depressed can you help me please?

Hi, My name is Josh and im 14 years old. Not too long ago my mum died due to 24 years of cancer and 7 years of heart failure. My mum was my whole life, every day i would spend with my mum and i would hug her all the time. Since my dad lives in Devon and im in Southampton, i was not comfortable moving schools. A few weeks after my mum ped away my brother moved down to Devon. He was all i had after she ped away. In the last year of my mum's life, a tumour occurred in her brain, causing her to have fits. My brother was never in the house when she had a fit, leaving me to 'deal with her' by myself. It came to a shock to me as she had never had a fit before.... This left me somewhat mentally disturbed. Ever since i have had to live with my auntie (who i don't really get on with) and now i find it really hard to talk to people or go outside. I stay on my computer all day as in a way, it is the closest thing to a Caring family member i have (because of facebook and my friends on facebook) but im really depressed and don't know what to do with my self. Please help :(