O+ can give to only positives of all A, B and O. Whereas O- and AB is universal. I think that's how it is. But yes, I can only give to Positives.
You're blood type B that's why no one wants it! HAHA. I'm watching this U-Kiss show that works around their blood types and man--the youngest member is B and he's so..eww. lmfao. But I think it's because he's still a little kid too. I <3 ELI.