Only you will really be able to answer your question. Even if someone is used to your disorder it doesn't mean they will be able to tolerate it in the future and if you don't feel romantic feelings for guy B i don't think it would be fair to enter into a relationship with him again. I would work on your disorder as best you can and learn from your mistakes with guy A - if things work out, great, if not then at least you'll have even more of an oppertunity to come to terms with your condition and work on how you relate to people and communicate with them. All the best.