Hello Simon,
I believe by posting this it is a start to your answers.
Sit down and ask yourself what is going around in your life, what you angry at and why and how you can change this.
Then pray everyday to Jesus/The Lord and ask him to deliver you, start going to church as well. Praying i the Lord's house help you too.
The Lord loves you, it is us that let him down by our sins, he is with you and the angels are around you.
Throw away any bad things in your house too.
I pray the Lord helps you from this torment you suffer.
God Bless you