Failed first year chemical engineering

I suffered from depression and failed 3 of my modules which were resit attempts, so even though I am pleading with them on emails and Personal Extenuating Circumstances forms, I know I will most likely not be allowed to progress to second year. I have wasted so much of my parents' time and money, I feel so useless and hopeless, I have let them down beyond imagination and there is nothing left for me. My train ticket back to uni is booked for this Saturday, and I don't have the heart to tell them yet. If anyone out there has any advice for me, please let me know. I wish there was something I could do.