Trip to USA to meet my parents

Parents are the blessings in life. Lucky are those people in this world who get to spend their time with their family. Lucky are those who can eat the delicious food made by their mom and can go fishing with their dad. Its been 2 years since I last saw my parents as they are living in USA as immigrants. I couldn't join them as I crossed the age limit so they rejected my file. I am now left alone in Bangladesh. I cant afford to visit them either as it requires money to show in my bank account. I need to show that I have 5k in my account for the tourist visa which I don't have now. My parents are also in debt so cant ask from the either. Are there any good soul in this earth who will help me to see the beautiful faces of my parents? Are there anyone who can donate some happiness?