Here is my experience:
I have a boyfriend soon for 2 years (soon = December).
My boyfriend is a straight guy and knows anything I know about me. He is awesome, supportive, loving, considers me as a most wonderful person and unless I was so whiny and hating some stuff in me so much, I am pretty sure that my little health problem this community knows all to well would have probably been completely forgotten.
Thing is, it is irelevant to someone who loves you. Once someone loves you it's just like "Ok.. so you had the pox when you were 3.", it is simply not there. Except for you - the people most bothered by this are not the people around us, they are the people with it. Seeing it all the time, even when it cannot be seen anymore, whining about it, being afraid of it and of what other people would say.
I live in a really small town, it's called a kibbutz (Israeli!) - EVERYONE in the kibbutz knows because there is no chance when they are only about 150-200 families in a tiny beautiful place. Well, no one cares, better, people are supportive and complement. I even started working in the dinning room which is a meeting place for everyone in the kibbutz, almost everyone comes to eat there every day and they see me either at maintaince or as the cashier. Except for a few silly but not bad people who can't do 1+1, everyone complements and treats me as just any other girl, even more special - they tell me I achieved something amazing. The few silly people, well some of them changed their attidue with time or because someone else asked them and one or two I even kindly asked "Could you please try to respect me?" a person once said "Huh, what?" and I just said "you know, just take a look and try to understand", he then apologized and changed ever since. I think there is just one truly idiot person left, but I don't care, everyone knows he is an idiot even beyond this

Outside, no one needs to respect anything because no body knows. And as far as I know if you truly make really good friendship with a guy and only then move on to the next step, well, if you didn't feel safe telling him everything about you already then maybe you shouldn't consider him as an option for anything more yet because you don't feel safe and you don't trust him. I can understand that sometimes the reason might be different, instead it would be that you told him everything BUT that.. but if you know him as well as you should, you should probably know what his reaction will be once you use your instincts and not focus on your fears.
Thing is, at one point you are just like anyone else and the ghost or shadow of this problem, only you can see, even if it is not there anymore. And most people don't really care once you tell them, because they care about you. If it changes anything then there are two options: either they are stupid or their reaction is confused - So don't lose hope on them yet! People sometimes can say things they don't mean just because of norms and confusion taking over them, give them time if that is the case and give them some space.. Then see if it is really final but remember, they might be as afraid to approach you again as you might be, due to anger or disappointment at your case.