I know food costs in Thailand and I am very surprised that for eat you must go to begging for food by your friends .
What does your mother for you? She and her partner do not work? your mother doesn't help you ?
Perhaps you and your mother thought that you good and young student that you do not work you need to help your mother and her partner ?
My mother divorced by my father when I was 3 months old , and she was alone , she died of works to help me to study , I never helped my mother's with money, she didn't want never my money , she give me everything I needed , she give me all her life only for love , without receiving anything in return from me , she want only help me as student to become a real and good man.