Help my son

Hello, I would really appreciate help in raising funds for my son. I am a single mum who works full time and I have no support from anyone financially. I struggle to meet my monthly bills and costs and I never have anything left over to try and save for a holiday for my son. He will be 13 in January 2019 and my dream would be to do something nice for him for his birthday. He has never been on holiday and I would love for him to go away with me. Things have not always been easy for him and without going into detail he did not have a good experience early on in life with his father. Who walked out on him at the age of 2 years old and never came back. he has always struggled in school with his dyslexia and tries so hard to do his best. He such a loving and caring son and it would mean the world for me to do something for him