Save Randy's Life

Hi everyone, I have a dog named Randy, he is a 2 yr old pitbull. He is the sweetest pitty alive. I have had him since he was 2 months and he is like my son. Unfortunately, he has torn his ACL ligaments in both of his back knees and can barely walk. He has developed arthritis in his right knee due to the rupture. His veterinarian said there are many reasons that could have caused this injury; his weight, running, landing improperly on his feet, slippery floors, etc. It is unknown. Randy is in extreme pain and is under a lot of pain & anti-flammatory medications until I can raise up the money for his surgery. My options are: raise the money for his surgery, give him up for adoption or put him down. I am a part-time student and single person and it is extremely hard for me to afford this surgery. I am begging you to please help this poor dog. I have faith in God that I will not have to put him down and raise the money for his surgery, anything helps. He is too young to die and deserves a chance for life. Thank you so much.