Wow, I do hope you are ok mate. I can identify with much of what you are saying, I have suffered with seizures since I was a child and they have pretty much dictated/destroyed my life at times over the years. Relationships are really hard as a lot of people just can't cope with it and don't want to watch a loved one going through what is involved with having a seizure (I have seen someone else have one and it's a horrible thing to watch that I would'nt wish on my worst enemy) I have met a few women over the years who have just not been able to cope with it, although I freely admit to having drug issues in the past which did'nt help the situation.
I'm guessing you take meds for this? it's just that a lot of the seizure meds can have some pretty horrendous side effects. I'm in no doubt that years of taking seizure meds has left me with fairly major anxiety and depression issues and my hands shake like I have Parkinson's disease. I don't know about you but a key thing for me is self confidence and I would suggest it's something you should try to work/get help with, I have struggled loads with it over the years and even recently I have not been feeling too great about stuff and much of it has been down to that, I have spoken to other people over the years and it seems to be a common issue amongst seizure sufferers.
Start by doing something that makes YOU feel good about YOU again, and go from there, don't worry about the girlfriend thing at the moment your health is more important (as others have said) go and speak to someone if you need to, I have done it loads and probably could do with it again tbh, there are some amazing people out there and they want to and can help you mate. If you want to ever chat just message me mate.