Hi Mary! There isn't a specific forum here just for those wanting to meet someone. But I have heard of people meeting on boards such as this and forming a relationship. I'm not sure what your specific medical issue is but if there's a forum here that applies to you that might be a starting point.
There might be dating services geared towards those with a disability....I'm not sure.....but you'd have to be careful just as you would with a regular dating service. Possibly more cautious since there are whackadoos out there looking to prey on those who are considered more vulnerable.
It's hard enough trying to date and meet someone nice when everything is OK.....add a medical problem to the mix and it's twice as hard. Good luck to you, though.