i was in the xact same position as you a few months, personally, i just told my b/f straight out but didn't make him think it was a huge deal or anything, i just said i had a lung disease which has a few attachments along with it, it's a pain in the a** sometimes but most of the time i am just as capable as anyone just sometimes i get a few reminders that i have to appreciate life.then i just made a joke of it by saying "lucky you having an extra special girlfriend!". If he doesn't accept he really is not worth it, let me know how it goes, i don't think my b/f friend thought anything else of it after until i was sick but in fairness he stood by me and always wanted to visit me, he asked a few questions at the time like "are you ok now?" "is that why you always hide that blue box with the tablets in it even though i saw you swallow them?" "can i catch anything?" "is there a cure?" actually the morei think of it he asked alot of questions but that's normal, good luck antway and let me know how it goes. xx