I don't believe it's anything to be ashamed of. If I found out my date wore diapers, I might ask questions about it, but I would never make fun of them or make him/her feel bad about it. In fact, I'd help change his/her diaper if she needs help. I don't think anyone has a right or reason to make someone feel bad about a problem he/she has. Hang in there. You'll find someone you'll like. If he asks about the diapers, just tell the truth. If he's supportive and kind about it, then hopefully, he'll be the man you'll want to spend time with. If he redicules you, then just call it off. You don't deserve to be treated like that.
Jamie,
Hey, how are you?
I just wanted to say to hang in there. High school is very hard. I am now 22, and at your age i did get made fun of and turned down by a few people. I am now dating a wonderful person that is great about my medical problems. My advice to you would be just wait a year or too, and look for mature sweet girls and will be able to look past it. If you need any more advice feel free to ask.
-dave