I agree with Hannah. I have heard many great things about dogs that can be trained to not only detect seizures, but can carry meds and instructions, can be trained to go for help, and to pull the epileptic to safety if they end up in a dangerous area. From what I understand, German Shepherds are the best for this work. Often times, little known government programs or private organizations like charities or churches will step in to help with most or all of the cost involved in retaining this type of dog.
I would certainly look into government help in getting a specialty dog. They can and have saved numberous lives, and will provide the epileptic with a better sense of independence, since they can go out on their own safe in the knowledge that if they have a seizure, they have someone who will watch over them, and the dogs cannot by LAW be excluded from anywhere. You have a very special case where you DESERVE to have help in this regard if you need it, please don't let pride prevent you from seeking this route.
Good luck to you. I have a friend with epilepsy, and through the support of her husband, she has been able to pursue a normal life. Along with a dog, she has a type of life alert device around her neck at all times, so if she feels herself going into a seizure, she can press the button and alert help. You will get through this, and the fact that you are willing to ask for help shows just how strong a man you are. When she seizes, don't freak out, it will only make her freak out. Be calm, and let her know everything will be ok. You are already on the right path. Good luck and God Bless.