you can't blame someone for not being comfortable with something, and i think it's very common to not want to be with someone because they're bisexual. however... that's not what this is about. once someone starts calling you names in a malicious way then it's perhaps gone a bit past discomfort. and as for school problems, people will get over the fact that you;re bisexual fairly quickly (if they even care at all), people probably won't know what on earth a furry is (again, nor care), and as for the fighting if they're gonna pick on someone who can't fight back then you;re the better man. i can't offer any advice on the issue (i have a pretty poor record of school-yard fights), plus i'm a pacifist so i'm gonna offer advice for me as an individual, not you. i'm sorry i can't be of any more help;
if it makes you feel any better i once had a relationship with someone of the opposite gender (while i still identified as bisexual. i still am really but do not want any kind of relationship with females right now), and after i think 6 or 7 weeks, i somehow discovered that she didn't believe that bisexuals even existed, that we were all either gay, straight or just confused. i felt very patronised by that and so i left her.