I don't know what's in your future. I'm 27 and have a disability as well. I have a type of muscular dystrophy which effects mostly my legs. I can walk without crutches just fine but I can't run, have trouble walking up stairs, and get tired rather quickly. My muscles can also get very tight and make me look like i walk flatfooted.
Now i am also very positive and exercise often which helps. I think i'm good looking and have a good sense of humor and personality as well. But i have been single all my life. I don't think however i can blame it on one thing. Maybe our personalities didn't match. Maybe she wasn't looking for a serious relationship. Maybe it was my disease. Maybe it's due to the fact i'm indian and most girls i'm around are white. Maybe i was just being too picky. I try not to think about it because you can never really know.
The thing is that the majority of people, especially young people, like to date someone they are familiar with, someone they think they can relate to. There are exceptions but most people don't date someone of a different culture, ethnicity, or someone who is physically different. Too many people are raised in their little boxes and are afraid to date someone dealing with something they are not familiar with or appear different. It doesn't have to be race. If your style, interests, personality, or physical attributes are too different many girls won't consider dating you.
Now i think there is a girl for me and girl for you out there who will be very special because a typical person doesn't date someone who is handicapped. I hope you find that person, but personally i really don't mind being single. I find there are many other things in life to appreciate and i have a feeling you have the same positive attitude. I think you just want to understand what's going on and I hope my explanation helped.