What do I have to do when I am being teased for being in special ED?

For 2 months,I been in special ED because I found out that I was BIPOLAR.Kids been asking me why I am in special ED and I would just walk away.They through food at me or trip me in halls telling me that im retarded.I am also Dyslexic.I feel like a retard.I can not spell like da othe r kids and I dont know what to do.I have tu be in special ed for the rest of next year.What do I supposed to do if they keep messin wit mie.